Direct autonomous vehicle to autonomous vehicle communications

ABSTRACT

A system comprises a lead autonomous vehicle (AV), a control device associated with the lead AV, and a following AV. The control device receives a command to navigate the lead AV to avoid an unexpected road condition. The control device receives sensor data from a sensor of the lead AV, comprising location coordinates of objects ahead of the lead AV. The control device accesses environmental data associated with a portion of a road between the lead AV and following AV. The environmental data comprises location coordinates of objects between the lead AV and following AV. The control device determines whether an object in the sensor data or environmental data impedes performing the command by the following AV. The control device updates the command, if the control device determines that an object impedes performing the command by the following AV, and communicates the updated command to the following AV.

TECHNICAL FIELD

The present disclosure relates generally to autonomous vehicles. Moreparticularly, the present disclosure is related to direct autonomousvehicle to autonomous vehicle communications.

BACKGROUND

One aim of autonomous vehicle technologies is to provide vehicles thatcan safely navigate towards a destination. In some cases, an unexpectedroad condition may occur on a road traveled by an autonomous vehicle.For example, an unexpected weather condition or unexpected traffic maybe observed on the road ahead of the autonomous vehicle. Currentautonomous vehicle technologies are not configured to account for suchunexpected road conditions.

SUMMARY

Current autonomous vehicle technologies are not configured to accountfor unexpected road conditions. This disclosure recognizes variousproblems and previously unmet needs related to communicating commands toautonomous vehicles (AVs). Certain embodiments of this disclosureprovide unique technical solutions to technical problems of currentautonomous vehicle technologies, including those problems describedabove to communicate commands to one or more AVs heading towardunexpected road conditions. The disclosed system is configured todetermine different levels of granularity of commands for one or moreAVs. In some examples, the commands may be broad commands, while inother examples they may be specific commands.

The broad commands may be related to a specific road condition, anddirected to one or more AVs heading toward a specific road condition.The unexpected road conditions may include, but are not limited to, anunexpected weather condition, an unexpected traffic congestion, a roadclosure, an obstacle on a road, a construction zone, among others. Forexample, an unexpected road condition on a road traveled by one or moreAVs may be detected, by an operation server operably coupled with theone or more AVs, by analyzing environmental data associated with a timewindow during which the one or more AVs are traveling along the road,and comparing the environmental data with map data that comprisesexpected road conditions. The environmental data may comprise weatherdata and traffic data. The operation server may access the environmentaldata from external sources, such as live weather reporting, live trafficreporting, etc. Upon detecting the unexpected road condition, a broadcommand may be communicated to the one or more AVs, indicating that theunexpected road condition is detected on the road, and to take a detour.

The specific commands may be related to a specific road condition, anddirected to a particular AV experiencing the specific road condition.For example, assume that the particular AV is traveling along a roadthat is closed by a road closure. Upon detecting the road closure, bythe operation server operably coupled with the particular AV, a specificcommand may be communicated to the particular AV, indicating to takespecific action (e.g., take the next exit, take a first right turn,proceed fifty feet, and pull over).

This disclosure contemplates detecting various unexpected roadconditions, and issuing commands (e.g., broad or specific commands) toone or more AVs headed toward an unexpected road condition. In somecases, a command is communicated from an operation server to one or moreAVs, similar to the examples described above, i.e., an operationserver-to-AV commands.

In some cases, upon receiving a command, an AV (or an in-vehicle controldevice associated with the AV) may update the command based on analyzingsensor data received from sensors on the AV. For example, the AV mayupdate the command, if the in-vehicle control device determines thatthere is an obstacle on a pathway for navigating the AV according to theissued command. For example, assume that a command sent to the AVindicates to pull over to a first location on a side of a road. Also,assume that the sensors of the AV detect that the first location isoccupied by an obstacle. Thus, in this example, the in-vehicle controldevice determines that the obstacle impedes performing the issuedcommand. Thus, the in-vehicle control device may search for anobstacle-free location. Upon finding a second location that isobstacle-free, the in-vehicle control device may update the command topull the AV over to the second location, e.g., fifty feet ahead of thefirst location.

In some cases, an AV may communicate a command to the operation server,i.e., an AV-to-operation server command. For example, an AV maycommunicate a command that includes one or more navigation instructionsto the operation server upon detecting an unexpected object on itstraveling pathway. The AV (or an in-vehicle control device associatedwith the AV) may detect the unexpected object by analyzing sensor datareceived from its sensors, and comparing the sensor data with map datathat includes expected objects ahead of the AV, such as road signs,buildings, terrain, lane markings, road boundaries, traffic lights, etc.By comparing the sensor data and the map data, the AV may detect thatthe unexpected object included in the sensor data is not included in themap data. The AV may determine a proposed command or navigationinstruction to avoid the unexpected object. The AV may communicate theproposed command to the operation server for confirmation, affirmation,or acknowledgment. The operation server may confirm, revise, or overridethe proposed command, and communicate a confirmation or revision to theAV. Upon receiving the confirmation or revision, the AV may perform theoriginal or a revised command.

In some cases, a first AV may communicate a command to a second AV,i.e., an AV-to-AV command. For example, assume that the first and secondAVs are on the same road, and the first AV is ahead of the second AV.Also, assume that the first AV has received a command, from theoperation server, to avoid an unexpected road condition ahead of thefirst AV. The first AV may or may not update the command, based onanalyzing the sensor data, similar to that described above.

In one embodiment, the first AV may indirectly communicate the command(or the updated command) to the second AV. For example, the first AV maycommunicate the command (or the updated command) to the operationserver, and the operation server may communicate the command (or theupdated command) to the second AV.

In another embodiment, the first AV may directly communicate the command(or the updated command) to the second AV, for example, using aVehicle-2-Vehicle (V2V) network interface if the second AV is within aV2V communication range of the first AV. In this embodiment, the firstAV accesses environmental data associated with a portion of the roadbetween the first AV and the second AV. The environmental data maycomprise location coordinates of a plurality of objects detected by thesensors of the first AV while the first AV was traveling along theportion of the road between the first and second AVs. Since the first AVhas already traveled the portion of the road between the first andsecond AVs, the first AV has experienced and recorded the environmentaldata. The first AV may determine whether an object detected in thesensor data and/or environmental data (associated with the portion ofthe road between the first and second AVs), impedes performing theissued command by the second AV. In this process, for example, the firstAV may receive the trajectory of the second AV (e.g., from the operationserver and/or the second AV), and determine whether any object detectedin the sensor data and/or environmental data is on the traveling pathwayof the second AV. The first AV may determine that an object impedesperforming the command by the second AV, if the object is on thetraveling pathway of the second AV. If the first AV determines that theobject detected in the sensor data and/or environmental data impedesperforming the issued command by the second AV, the first AV updated thecommand for the second AV such that the updated command includes one ormore navigation instructions to avoid objects on the traveling pathwayof the second AV while performing the command. In a similar manner, thefirst AV may communicate a second updated command to a third AVtraveling behind the second AV, based on analyzing the aggregate ofenvironmental data associated with the road between the first AV and thethird AV, if the third AV is in the V2V communication range of the firstAV.

In cases where the third AV is not in the V2V communication range of thefirst AV, but the third AV is in the V2V communication range of thesecond AV, the second AV may access and analyze the environmental dataassociated with the road between the second AV and the third AV, andcommunicate a command to the third AV to avoid objects on the travelingpathway of the third AV while performing the command. In this manner,this disclosure contemplates communications among a network mesh of AVs,where different subsets of AVs may be in various V2V communicationranges from other subsets of AV. Thus, this disclosure contemplatesone-to-one, one-to-many, and many-to-many communications among thenetwork mesh of AVs and the operation server.

With respect to communicating commands from an operation server to anAV, in one embodiment, a system comprises an AV and an operation server.The AV comprises at least one vehicle sensor, where the AV is configuredto travel along a road. The operation server is communicatively coupledwith the AV. The operation server comprises a processor. The processoris configured to access environmental data associated with the roadahead of the AV. The environmental data is associated with a time windowduring which the AV is traveling along the road. The processor comparesthe environmental data with map data that comprises expected roadconditions ahead of the AV. Based on comparing the environmental datawith the map data, the processor determines whether the environmentaldata comprises an unexpected road condition that is not included in themap data. In response to determining that the environmental datacomprises the unexpected road condition that is not included in the mapdata and/or an operational design domain that corresponds to conditionsthat the AV is capable of operating safely, the processor determines alocation coordinate of the unexpected road condition, and communicates acommand to the AV to maneuver to avoid the unexpected road condition.

With respect to an receiving a command, by an AV, from an operationserver, in one embodiment, a system comprises an AV and a controldevice. The AV comprises at least one vehicle sensor, where the AV isconfigured to travel along a road. The control device is associated withthe AV. The control device comprises a processor. The processor isconfigured to receive, from an operation server, a command to navigatethe AV to avoid an unexpected road condition. The processor receives,from the at least one vehicle sensor, sensor data comprising locationcoordinates of a plurality of objects ahead of the AV. The processordetermines whether at least one object from the plurality of objectsimpedes performing the command. In response to determining that the atleast one object from the plurality of objects impedes performing thecommand, the processor updates the command, such that the updatedcommand comprises one or more navigation instructions to avoid the atleast one object while performing the command. The processor navigatesthe AV according to the updated command.

With respect to a lead AV communicating a command to a following AV, inone embodiment, a system comprises the lead AV and the following AV. Thelead AV comprises at least one vehicle sensor. The lead AV is configuredto travel along a road. The following AV is different from the lead AV,and is communicatively coupled with the lead AV. The following AV istraveling along the road behind the lead AV. The lead AV is associatedwith a control device. The control device comprises a first processor.The first processor is configured to receive a command to navigate thelead AV to avoid an unexpected road condition ahead of the lead AV. Thefirst processor receives, from the at least one vehicle sensor, sensordata comprising location coordinates of a first plurality of objectsahead of the lead AV. The first processor accesses a first set ofenvironmental data associated with a portion of the road between thelead AV and the following AV. The first set of environmental datacomprises location coordinates of a second plurality of objects betweenthe lead AV and the following AV. The first processor determines whetherat least one object from the first and second plurality of objectsimpedes performing the command by the following AV. In response todetermining that the at least one object impedes performing the commandby the following AV, the processor updates the command for the followingAV based at least in part upon the sensor data and the first set ofenvironmental data, such that the updated command comprises one or morenavigation instructions to avoid the at least one object whileperforming the command. The first processor communicates the updatedcommand to the following AV.

The disclosed systems provide several practical applications andtechnical advantages which include: 1) technology that determinesdifferent granularity levels of commands, including broad and specificcommands, where each granularity level of commands may be related to aspecific road condition, and directed to one or more AVs that are headedtoward the specific road condition; 2) technology that communicates acommand (e.g., broad or specific command) to a first AV to avoid anunexpected road condition on a road traveled by the first AV, inresponse to detecting the unexpected road condition, where theunexpected road condition is associated with a time window during whichthe first AV is traveling along the road; 3) technology that updates areceived command, in response to detecting an obstacle on a pathway ofnavigating the first AV according to the received command, anddetermining that the obstacle impedes navigating the first AV accordingto the received command; 4) technology that enables indirect datacommunication between the first AV and a second AV through an operationserver; 5) technology that enables direct data communication between thefirst AV and the second AV within a V2V communication range; and 6)technology that communicates the command (or the updated command) to thesecond AV, informing the second AV about the unexpected road conditionand the obstacle impeding navigation according to the issued command.

As such, the systems described in this disclosure may be integrated intoa practical application of determining a more efficient, safe, andreliable solution for determining and communicating commands to AVs toavoid unexpected road conditions. Furthermore, the systems described inthis disclosure may be integrated into an additional practicalapplication of determining a more efficient, safe, and reliablenavigation solution for AVs that are headed toward an unexpected roadcondition, even if the unexpected road condition is not within the fieldof view or detection zone of sensors of those AVs. For example, fromlive weather reporting and/or traffic reporting, the operation servermay detect an unexpected road condition that is outside the detectionzone of the sensors of the AVs, and issue a command to the AVs to avoidthe unexpected road condition. Accordingly, the disclosed system mayimprove the current autonomous vehicle technologies.

Furthermore, the disclosed system may improve data communication amongAVs and the operation server that is tasked to oversee operations of theAVs. For example, the disclosed system may establish a communicationchannel between a first AV and one or both of the operation server and afollowing AV within a V2V communication range of the first AV. As such,the first AV can send and receive data (e.g., command or any other data)to and from the operation server and/or the following AV.

As such, by improving data communication among the AVs and the operationserver, the disclosed system provides frequency bandwidth allocationflexibility for different AVs in cases where a fleet of AVs are ontraveling on the same road. Thus, the disclosed system may leverage theV2V communications for load balancing and processing resource balancingat different network/access nodes (e.g., the operation server or any AVin the fleet) to reduce or minimize data transmission overhead at oneaccess/network.

Furthermore, by improving data communication among the AVs and theoperation server, the disclosed system may further improve tracking theAVs and monitoring autonomous operations of the AVs. For example,current data communication technologies used in the current autonomousvehicle technologies may suffer from limitations of an existing networkinfrastructure that is already in place. The disclosed system mayimplement in an AV one or more computing agent units that are configuredto operate in various communication states.

For example, when the AV is connected to an operation server and afollowing AV, the one or more computing agent units transition to a“connected to the operation server and a following AV” state. In thisstate, the AV can send and receive data (e.g., command or any otherdata) to and from the operation server and/or the following AV.

In another example, when the AV is connected to the following AV, theone or more computing agent units transition to a “connected to thefollowing AV” state. Thus, if the communication between the AV and theoperation server is lost, the AV can send and receive data (e.g.,commands or any other data) to and from the following AV.

In another example, when the AV is connected to the operation server,the one or more computing agent units transition to a “connected to theoperation server” state. Thus, if the communication between the AV andthe following AV is lost, the AV can send and receive data (e.g.,commands or any other data) to and from the operation server.

In other example, if connections between the AV and both of theoperation server and the following AV are lost, the one or morecomputing agent units transition to a “executing a command withoutconnections with the operation server and following AV” state. In thisstate, the control device associated with the AV pulls the AV over to aside of a road until the communication with either or both of theoperation server and the following AV is reestablished.

In this manner, the disclosed system may improve data communication withthe AVs, tracking the AVs, and monitoring autonomous operations of theAVs.

Certain embodiments of this disclosure may include some, all, or none ofthese advantages. These advantages and other features will be moreclearly understood from the following detailed description taken inconjunction with the accompanying drawings and claims.

BRIEF DESCRIPTION OF THE DRAWINGS

For a more complete understanding of this disclosure, reference is nowmade to the following brief description, taken in connection with theaccompanying drawings and detailed description, wherein like referencenumerals represent like parts.

FIG. 1 illustrates an embodiment of a system configured to communicatecommands among one or more autonomous vehicle (AVs) and an operationserver;

FIG. 2 illustrates an embodiment of a system configured to communicate,from an AV, commands to the operation server and/or a following AV;

FIG. 3 illustrates an example flowchart of a method for communicatingcommands among one or more AVs and the operation server;

FIG. 4 illustrates an example flowchart of a method for communicating,from an AV, commands to the operation server and/or a following AV;

FIG. 5 illustrates a first example embodiment of a system configured tocommunicate commands among AVs;

FIG. 6 illustrates a second example embodiment of a system configured tocommunicate commands among AVs;

FIG. 7 illustrates an example flowchart of a method for communicatingcommands among AVs;

FIG. 8 illustrates a block diagram of an example autonomous vehicleconfigured to implement autonomous driving operations;

FIG. 9 illustrates an example system for providing autonomous drivingoperations used by the AV of FIG. 8; and

FIG. 10 illustrates a block diagram of an in-vehicle control computerincluded in the AV of FIG. 8.

DETAILED DESCRIPTION

As described above, previous technologies fail to provide efficient,reliable, and safe solutions for determining and communicating commandsto AVs to avoid unexpected road conditions. This disclosure providesvarious systems, methods, and devices for 1) communicating a command toa traveling AV to avoid an unexpected road condition; 2) improving datacommunication with the AV; 3) improving navigation of the AV; 4)improving tracking of the AV; 5) improving monitoring of the autonomousoperations of the AV; and 6) providing a safe driving experience for theAV, other vehicles, and pedestrians.

In one embodiment, a system 100 and a method 300 for communicatingcommands among an operations server and one or more AVs are describedherein with respect to FIGS. 1 and 3, respectively. In one embodiment, asystem 200 and a method 400 for receiving commands, by an AV, from theoperation server and/or a following AV are described herein with respectto FIGS. 2 and 4, respectively. In one embodiment, systems 500 and 600,and method 700 for communicating commands among AVs are described hereinwith respect to FIGS. 5-7, respectively. In one embodiment, an exampleAV and its various systems and devices for implementing autonomousdriving operations by the AV are described herein with respect to FIGS.8-10.

Example System for Communicating Commands Among an Operation Server andOne or More AVs

FIG. 1 illustrates an embodiment of a system 100 for communicatingcommands 130 among an operation server 120 and one or more AVs 802. FIG.1 further illustrates a simplified schematic diagram of a road 102traveled by the one or more AVs 802, such as the AV 802 a and afollowing AV 802 b, where the one or more AVs 802 are headed towardvarious exemplary unexpected road conditions 156. In one embodiment,system 100 comprises the operation server 120 and one or more AVs 802(see FIG. 8 for further description of an AV 802). System 100 mayfurther comprise an application server 160, a remote operator 162, and anetwork 110. Network 110 provides communication paths among componentsof the system 100. The system 100 may be configured as shown or in anyother suitable configurations.

In general, system 100 (at the operation server 120) accessesenvironmental data 150 comprising weather data 152 and traffic data 154that provides information about the conditions of the road 102. Theenvironmental data 150 may further comprise road safety regulation data,data related to obstacles 118 (e.g., location coordinates, shapes,sizes, and types of a road closure 104, object(s) 106, constructionzone(s) 108, etc.), among others. For example, the operation server 120receives the environmental data 150 from one or more external sources,such as live weather reporting, live traffic reporting, etc. Theoperation server 120 (via processor 122) compares the environmental data150 with map data 142 that comprises expected road conditions ahead ofthe AV 802 a. The expected road conditions may comprise predictedweather conditions and traffic congestions ahead of the AV 802 a on theroad 102. The expected road conditions may further comprise expectedroad safety data associated with the road 102, expected road elevationdata (e.g., elevation information of different road segments),information related to expected objects ahead of the AV 802 a (e.g.,location coordinates, shapes, sizes, and types of lane markings, roadsigns, traffic lights, crosswalks, etc.), historical driving informationof one or more AVs 802 on the road 102, among others. Based on comparingthe environmental data 150 and the map data 142, the operation server120 determines whether the environmental data 150 comprises anunexpected road condition 156 that is not included in the map data 142.For example, the unexpected road conditions 156 may comprise unexpectedweather conditions, unexpected traffic congestions, unexpected roadclosure 104, unexpected object(s) 106, unexpected construction zone(s)108, or any other unexpected road condition 156 that is not included inthe map data 142. In response to determining that the environmental data150 comprises an unexpected road condition 156, the operation server 120determines a location coordinate 158 of the unexpected road condition156, and communicates a command 130 to the AVs 802 a to maneuver toavoid the unexpected road condition 156. The corresponding descriptionbelow comprises a brief description of certain components of the system100.

System Components

Network 110 may be any suitable type of wireless and/or wired networkincluding, but not limited to, all or a portion of the Internet, anIntranet, a private network, a public network, a peer-to-peer network,the public switched telephone network, a cellular network, a local areanetwork (LAN), a metropolitan area network (MAN), a wide area network(WAN), and a satellite network. The network 110 may be configured tosupport any suitable type of communication protocol as would beappreciated by one of ordinary skill in the art.

Operation server 120 is generally configured to oversee the operationsof the AV 802. The operation server 120 comprises a processor 122, anetwork interface 124, a user interface 126, and a memory 128. Thecomponents of the operation server 120 are operably coupled to eachother.

The processor 122 may include one or more processing units that performvarious functions as described herein. The memory 128 stores any dataand/or instructions used by the processor 122 to perform its functions.For example, the memory 128 stores software instructions 138 that whenexecuted by the processor 122 causes the operation server 120 to performone or more functions described herein.

The operation server 120 is in signal communication with the AV 802 andits components. The operation server 120 is further configured to detectobjects on and around a road 102 by analyzing the sensor data 148. Forexample, the operation server 120 may detect objects on and around aroad 102 by implementing object detection machine learning modules 140.The object detection machine learning module 140 may be implementedusing neural networks and/or machine learning algorithms for detectingobjects from images, videos, infrared images, point clouds, radar data,etc. The object detection machine learning module 140 is described inmore detail further below.

In one embodiment, the AV 802 may include a semi-truck tractor unitattached to a trailer to transport cargo or freight from one location toanother location (see FIG. 8). The AV 802 is navigated by a plurality ofcomponents described in detail in FIGS. 8-10. The operation of the AV802 is described in greater detail in FIG. 8. The correspondingdescription below includes brief descriptions of certain components ofthe AV 802. In brief, the AV 802 includes an in-vehicle control computer850 which is operated to facilitate autonomous driving of the AV 802. Inthis disclosure, the in-vehicle control computer 850 may beinterchangeably referred to as a control device 850.

Control device 850 is generally configured to control the operation ofthe AV 802 and its components. The control device 850 is furtherconfigured to determine a pathway in front of the AV 802 that is safe totravel and free of objects/obstacles, and navigate the AV 802 to travelin that pathway. This process is described in more detail in FIGS. 8-10.The control device 850 generally includes one or more computing devicesin signal communication with other components of the AV 802 (see FIG.8). The control device 850 receives sensor data 148 from one or moresensors 846 positioned on the AV 802 to determine a safe pathway totravel. The sensor data 148 includes data captured by the sensors 846.Sensors 846 are configured to capture any object within their detectionzones or fields of view, such as landmarks, lane markings, laneboundaries, road boundaries, vehicles, pedestrians, road/traffic signs,among others. The sensors 846 may include cameras, LiDAR sensors, motionsensors, infrared sensors, and the like. In one embodiment, the sensors846 may be positioned around the AV 802 to capture the environmentsurrounding the AV 802.

The control device 850 is in signal communication with the operationserver 120. The control device 850 is configured to communicate thesensor data 148 to the operation server 120, for example, via network110. The control device 850 may communicate the sensor data 148 to theoperation server 120 periodically (e.g., every minute, every fewminutes, or any other suitable interval), continuously, and/or uponreceiving a request from the operation server 120 to send sensor data148. The sensor data 148 may include data describing the environmentsurrounding the AV 802, such as image feed, video feed, LiDAR data feed,and other data captured from the fields of view of the sensors 846. Thesensor data 148 may further include location coordinates of the AV 802.See the corresponding description of FIG. 8 for further description ofthe control device 850.

Communication subsystem 210 is a component of the control device 850,and is generally configured to establish communication between the AV802 a and the operation server 120 and/or the following AV 802 b. Thecommunication subsystem 210 is further configured to receive commands130 or other suitable communications from the operation server 120and/or the following AV 802 b. Upon receiving a command 130, thecommunication subsystem 210 (or the control device 850) may implementthe command 130 or update the command 130 before implementing. See thecorresponding description of FIG. 2 for further description of thecommunication subsystem 210. The corresponding description belowdescribes various examples of commands 130.

Example Commands

Commands 130 generally comprise one or more instructions that may beused to navigate and/or configure one or more AVs 802. For example, thecommands 130 may include, but are not limited to instructions to: 1)transition, by an AV 802, from autonomous driving to manual driving; 2)avoid, by an AV 802, obstacles 118 (e.g., road closures 104, objects106, construction zones 108, etc.); 3) avoid, by an AV 802, one or morecertain lanes (e.g., lanes occupied by an obstacle 118, etc.); 4) avoid,by an AV 802, one or more certain routing plans 144 on which unexpectedroad conditions 156 or obstacles 118 are detected; 5) take, by an AV802, a certain re-route (e.g., by taking an exit 112); 6) operate, by anAV 802, in a manner different than driving instructions 146 (e.g.,driving slower or faster than the speed indicated in the drivinginstruction 146).

In some cases, a command 130 may be a configuration command 130 that isrelated to aspects other than navigating the AV 802. For example, aconfiguration command 130 may be related to changing sensor parameters,including changing a direction of a sensor 846 (e.g., tilting adirection of a sensor 846), changing a data sampling frequency of asensor 846, etc.

The commands 130 may comprise operation server-to-AV commands 132,AV-to-operation server commands 134, and AV-to-AV commands 136. Theoperation server-to-AV commands 132 are commands 130 that the operationserver 120 communicates to one or more AVs 802. The AV-to-operationserver commands 134 are commands 130 that an AV 802 communicates to theoperation server 120. The AV-to-AV commands 136 are commands 130 that afirst AV 802 (e.g., AV 802 a) communicates to a second AV 802 (e.g., AV802 b) directly or indirectly through the operation server 120.

In one embodiment, the remote operator 162 may determine and issue thecommands 130 from the operation server 120. The remote operator 162 maybe an individual who is associated with and has access to the operationserver 120. For example, the remote operator 162 may be an administratorthat can access and view the information regarding the AV 802, such asdata available on the memory 128. The remote operator 162 may access theoperation server 120 directly or indirectly. For example, the remoteoperator 162 may directly access the operation server 120 through acommunication path 164. By reviewing the operation server 120 andreviewing the environmental data 150, map data 142, routing plans 144,and sensor data 148 on the user interface 126 of the operation server120, the remote operator 162 may issue a command 130 for one or more AVs802. In another example, the remote operator 162 may indirectly accessthe operation server 120 from the application server 160 that is actingas a presentation layer via the network 110. The operation server 120may forward or communicate the command 130 to the one or more AVs 802.

In another embodiment, the process of determining and issuing commands130 may be computerized and performed by the operation server 120 and/orthe control device 850.

The commands 130 may have different levels of granularity. For example,different granularity levels of commands 130 may indicate whether acommand 130 is a broad command 130 a or a specific command 130 b, asdescribed below.

The commands 130, including broad commands 130 a and specific commands130 b described herein, are exemplary and are not meant to limit thescope of the invention as otherwise presented or set forth in the claimsattached hereto.

Broad Command Examples

A broad command 130 a may be related to a particular unexpected roadcondition 156 that applies to one or more AVs 802 generally. The broadcommand 130 a may be directed to one or more AVs 802, for example, on aparticular road 102 that are headed toward the particular unexpectedroad condition 156. As illustrated in FIG. 1, the AVs 802 are travelingalong the road 102, where the AV 802 a is ahead of the AV 802 b, and theAVs 802 may encounter different unexpected road conditions 156. For eachunexpected road condition 156, the operation server 120 may issue aparticular command 130 (i.e., an operation server-to-AV command 132), asdescribed below.

For example, the operation server 120 may communicate a broad command130 a to one or more AVs 802 indicating that there is a road closure 104on the road 102, and to find another routing plan 144 (e.g., a routingplan 144 that provides the safest driving experience) to reach thedestination. In another example, the operation server 120 maycommunicate a broad command 130 a to one or more AVs 802 indicating thatsevere weather is detected (e.g., based on the weather data 152) on theroad 102 ahead of the lead AV 802 a, and to find a next exit (e.g., exit112), and pull over. In another example, the operation server 120 maycommunicate a broad command 130 a to one or more AVs 802 indicating thatan unexpected object 106 (that is not detected in the map data 142) isdetected on the road 102, and to navigate around the unexpected object106. In another example, the operation server 120 may communicate abroad command 130 a to one or more AVs 802 indicating that an unexpectedconstruction zone 108 (that is not detected in the map data 142) isdetected on the road 102, and find a spot on a side of the road 102 topull over.

Specific Command Examples

A specific command 130 b may be related to a specific unexpected roadcondition 156 that applies to a particular AV 802. The specific command130 b may be directed to a particular AV 802 that is encountering thespecific unexpected road condition 156. For example, the operationserver 120 may communicate a specific command 130 b to AV 802 a thatthere is a road closure 104 on the road 102, and to take the next exit112, make a first right turn after the stop light, drive fifty feet,pull over on a side of a road, and await for further instructions. Inanother example, assume that the AV 802 a has pulled over on a side ofthe road 102, however, the AV 802 a is stopped two feet onto a sidelane. The operation server 120 may communicate a specific command 130 bto the AV 802 a to turn the steering wheel to the right for two seconds,move at a speed of two miles per hour (mph), and stop. In anotherexample, a specific command 130 b may be providing turn-by-turninstructions to the particular AV 802 a without taking over autonomousdriving of the AV 802 a.

The control device 850 and/or the operation server 120 may use the broadcommands 130 a and specific commands 130 b as a training dataset tolearn associations and relationships between each unexpected roadcondition 156 and its corresponding issued command 130. Thus, thecontrol device 850 and/or the operation server 120 may be trained toissue commands 130 with minimum (or without) human intervention (i.e.,interventions from the remote operator 162).

Operation Server

Aspects of an embodiment of the operation server 120 are describedabove, and additional aspects are provided below. The operation server120 includes at least one processor 122, at least one network interface124, at least one user interface 126, and at least one memory 128. Theoperation server 120 may be configured as shown or in any other suitableconfiguration.

In one embodiment, the operation server 120 may be implemented by acluster of computing devices that may serve to oversee the operations ofthe AV 802. For example, the operation server 120 may be implemented bya plurality of computing devices using distributed computing and/orcloud computing systems. In another example, the operation server 120may be implemented by a plurality of computing devices in one or moredata centers. As such, in one embodiment, the operation server 120 mayinclude more processing power than the control device 850. The operationserver 120 is in signal communication with one or more AVs 802 and theircomponents (e.g., the control device 850). In one embodiment, theoperation server 120 is configured to determine a particular routingplan 144 for the AV 802. For example, the operation server 120 maydetermine a particular routing plan 144 for an AV 802 that leads toreduced driving time and a safer driving experience for reaching thedestination of that AV 802.

In one embodiment, in cases where an unexpected road condition 156 isdetected by comparing the environmental data 150 and map data 142, theoperation server 120 may evaluate the environmental data 150 and mapdata 142, and determine a command 130 to navigate the AV 802. Forexample, in response to detecting a specific unexpected road condition156, the operation server 120 may determine and communicate a command130 to the AV 802 to avoid the unexpected road condition 156. In oneembodiment, the remote operator 162 may confirm, modify, and/or overridethe suggested command 130 (or navigation plan) of the operation server120, as described below.

In one embodiment, the navigating solutions or routing plans 144 for theAV 802 may be determined from V2V communications, such as one AV 802with another. In one embodiment, the navigating solutions or routingplans 144 for the AV 802 may be determined from Vehicle-to-Cloud (V2C)communications, such as the AV 802 with the operation server 120.

In one embodiment, the commands 130, navigating solutions, and/orrouting plans 144 for the AV 802 may be determined byVehicle-to-Cloud-to-Human (V2C2H), Vehicle-to-Human (V2H),Vehicle-to-Cloud-to-Vehicle (V2C2V), and/or Vehicle-to-Human-to-Vehicle(V2H2V) communications, where human intervention is incorporated indetermining navigating solutions for the AV 802. For example, the remoteoperator 162 may review the environmental data 150 and map data 142 fromthe user interface 126 and confirm, modify, and/or override the command130 for the AV 802 determined by the operation server 120 and/or thecontrol device 850. The remote operator 162 may add a human perspectivein determining the navigation plan of the AV 802 that the control device850 and/or the operation server 120 otherwise do not provide. In someinstances, the human perspective is more preferable compared tomachine's perspectives in terms of safety, fuel-saving, etc.

In one embodiment, the commands 130 for the AV 802 may be determined byany combination of V2V, V2C, V2C2H, V2H, V2C2V, V2H2V communications,among other types of communications.

As illustrated in FIG. 1, the remote operator 162 can access theapplication server 160 via communication path 166, and similarly, accessthe operation server 120 via communication path 164. In one embodiment,the operation server 120 may send the sensor data 148, commands 130,environmental data 150, and/or any other data/instructions to anapplication server 160 to be reviewed by the remote operator 162, e.g.,wirelessly through network 110 and/or via wired communication. As such,in one embodiment, the remote operator 162 can remotely access theoperation server 120 via the application server 160.

Processor 122 comprises one or more processors operably coupled to thememory 128. The processor 122 is any electronic circuitry including, butnot limited to, state machines, one or more central processing unit(CPU) chips, logic units, cores (e.g., a multi-core processor),field-programmable gate array (FPGAs), application-specific integratedcircuits (ASICs), or digital signal processors (DSPs). The processor 122may be a programmable logic device, a microcontroller, a microprocessor,or any suitable combination of the preceding. The processor 122 iscommunicatively coupled to and in signal communication with the networkinterface 124, user interface 126, and memory 128. The one or moreprocessors are configured to process data and may be implemented inhardware or software. For example, the processor 122 may be 8-bit,16-bit, 32-bit, 64-bit or of any other suitable architecture. Theprocessor 122 may include an arithmetic logic unit (ALU) for performingarithmetic and logic operations, processor registers that supplyoperands to the ALU and store the results of ALU operations, and acontrol unit that fetches instructions from memory and executes them bydirecting the coordinated operations of the ALU, registers and othercomponents. The one or more processors are configured to implementvarious instructions. For example, the one or more processors areconfigured to execute software instructions 138 to implement thefunctions disclosed herein, such as some or all of those described withrespect to FIGS. 1-7. In some embodiments, the function described hereinis implemented using logic units, FPGAs, ASICs, DSPs, or any othersuitable hardware or electronic circuitry.

Network interface 124 is configured to enable wired and/or wirelesscommunications. The network interface 124 is configured to communicatedata between the operation server 120 and other network devices,systems, or domain(s). For example, the network interface 124 maycomprise a WIFI interface, a local area network (LAN) interface, a widearea network (WAN) interface, a modem, a switch, or a router. Theprocessor 122 is configured to send and receive data using the networkinterface 124. The network interface 124 may be configured to use anysuitable type of communication protocol.

User interfaces 126 may include one or more user interfaces that areconfigured to interact with users, such as the remote operator 162. Theremote operator 162 may access the operation server 120 via thecommunication path 164. The user interfaces 126 may include peripheralsof the operation server 120, such as monitors, keyboards, mouse,trackpads, touchpads, etc. The remote operator 162 may use the userinterfaces 126 to access the memory 128 to review sensor data 148,environmental data 150, unexpected road conditions 156, and other datastored on the memory 128.

Memory 128 stores any of the information described in FIGS. 1-7 alongwith any other data, instructions, logic, rules, or code operable toimplement the function(s) described herein when executed by processor122. For example, the memory 128 may store commands 130, softwareinstructions 138, object detection machine learning modules 140, mapdata 142, routing plan 144, driving instructions 146, sensor data 148,environmental data 150, unexpected road conditions 156, locationcoordinates 158 for the unexpected road conditions, obstacles 118,and/or any other data/instructions. The software instructions 138include code that when executed by the processor 122 causes theoperation server 120 to perform the functions described herein, such assome or all of those described in FIGS. 1-7. The memory 128 comprisesone or more disks, tape drives, or solid-state drives, and may be usedas an over-flow data storage device, to store programs when suchprograms are selected for execution, and to store instructions and datathat are read during program execution. The memory 128 may be volatileor non-volatile and may comprise read-only memory (ROM), random-accessmemory (RAM), ternary content-addressable memory (TCAM), dynamicrandom-access memory (DRAM), and static random-access memory (SRAM). Thememory 128 may include one or more of a local database, cloud database,network-attached storage (NAS), etc.

Object detection machine learning modules 140 may be implemented by theprocessor 122 executing software instructions 138, and is generallyconfigured to detect objects or obstacles 118, including the roadclosure 104, unexpected object 106, and construction zone 108, from thesensor data 148. The object detection machine learning modules 140 maybe implemented using neural networks and/or machine learning algorithmsfor detecting objects from any data type, such as images, videos,infrared images, point clouds, Radar data, etc.

In one embodiment, the object detection machine learning modules 140 maybe implemented using machine learning algorithms, such as Support VectorMachine (SVM), Naive Bayes, Logistic Regression, k-Nearest Neighbors,Decision Trees, or the like. In one embodiment, the object detectionmachine learning modules 140 may utilize a plurality of neural networklayers, convolutional neural network layers, and/or the like, in whichweights and biases of these layers are optimized in the training processof the object detection machine learning modules 140. The objectdetection machine learning modules 140 may be trained by a trainingdataset which includes samples of data types labeled with one or moreobjects in each sample. For example, the training dataset may includesample images of objects (e.g., vehicles, lane markings, pedestrian,road signs, obstacles 118, etc.) labeled with object(s) in each sampleimage. Similarly, the training dataset may include samples of other datatypes, such as videos, infrared images, point clouds, Radar data, etc.labeled with object(s) in each sample data. The object detection machinelearning modules 140 may be trained, tested, and refined by the trainingdataset and the sensor data 148. The object detection machine learningmodules 140 use the sensor data 148 (which are not labeled with objects)to increase their accuracy of predictions in detecting objects. Forexample, supervised and/or unsupervised machine learning algorithms maybe used to validate the predictions of the object detection machinelearning modules 140 in detecting objects in the sensor data 148.

Map data 142 may include a virtual map of a city or an area whichincludes the road 102. In some examples, the map data 142 may includethe map 958 and map database 936 (see FIG. 9 for descriptions of the map958 and map database 936). The map data 142 may include drivable areas,such as roads 102, paths, highways, and undrivable areas, such asterrain (determined by the occupancy grid module 960, see FIG. 9 fordescriptions of the occupancy grid module 960). The map data 142 mayspecify location coordinates of road signs, lanes, lane markings, laneboundaries, road boundaries, traffic lights, obstacles 118, etc.

Routing plan 144 is a plan for traveling from a start location (e.g., afirst AV launchpad/landing pad) to a destination (e.g., a second AVlaunchpad/landing pad). For example, the routing plan 144 may specify acombination of one or more streets, roads, and highways in a specificorder from the start location to the destination. The routing plan 144may specify stages including the first stage (e.g., moving out from thestart location), a plurality of intermediate stages (e.g., travelingalong particular lanes of one or more particular street/road/highway),and the last stage (e.g., entering the destination). The routing plan144 may include other information about the route from the startposition to the destination, such as road/traffic signs in that routingplan 144, etc.

Driving instructions 146 may be implemented by the planning module 962(See descriptions of the planning module 962 in FIG. 9.). The drivinginstructions 146 may include instructions and rules to adapt theautonomous driving of the AV 802 according to the driving rules of eachstage of the routing plan 144. For example, the driving instructions 146may include instructions to stay within the speed range of a road 102traveled by the AV 802, adapt the speed of the AV 802 with respect toobserved changes by the sensors 846, such as speeds of surroundingvehicles, objects within the detection zones of the sensors 846, etc.

Environmental data 150 may include weather data 152 and traffic data 154that provide information about conditions of the road 102. Weather data152 may include weather information of regions or areas ahead of the AV802. For example, the weather data 152 may be accessed from weatherforecasting servers, live weather reporting, etc. The environmental data150 may further comprise road safety regulation data, data related toobstacles 118 (e.g., location coordinates, shapes, sizes, and types of aroad closure 104, object(s) 106, construction zone(s) 108, etc.), amongothers.

Traffic data 154 may include traffic data of roads/streets/highways inthe map data 142. The operation server 120 may use traffic data 154gathered by one or more mapping vehicles. The operation server 120 mayuse traffic data 154 that is captured from any source, such ascrowd-sourced traffic data 154 captured from external sources, e.g.,Waze® and Google Map®, live traffic reporting, etc.

Application Server

The application server 160 is generally any computing device configuredto communicate with other devices, such as other servers (e.g.,operation server 120), AVs 802, databases, etc., via the network 110.The application server 160 is configured to perform functions describedherein and interact with the remote operator 162, e.g., viacommunication path 166 using its user interfaces. Examples of theapplication server 160 include, but are not limited to, desktopcomputers, laptop computers, servers, etc. In one example, theapplication server 160 may act as a presentation layer from which theremote operator 162 accesses the operation server 120. As such, theoperation server 120 may send sensor data 148, commands 130,environmental data 150, and/or any other data/instructions to theapplication server 160, e.g., via the network 110. The remote operator162, after establishing the communication path 166 with the applicationserver 160, may review the received data and confirm, modify, and/oroverride the suggested command 130 determined by the operation server120, as described below.

Operational Flow

Communicating a Command from the Operation Server to an AV

The operational flow for communicating a command 130 from the operationserver 120 to an AV 802 may begin when an unexpected road condition 156is detected in the environmental data 150. For example, the operationserver 120 (and/or the remote operator 162) may detect that theenvironmental data 150 comprises an unexpected road condition 156 byreviewing the environmental data 150, and comparing the environmentaldata 150 with the map data 142 that comprises expected road conditionsahead of the AV 802 (e.g., AV 802 a). The environmental data 150 maycomprise weather data 152 and traffic data 154 in a time window duringwhich the AV 802 (e.g., AV 802 a) is traveling along the road 102.

Based on comparing the environmental data 150 with the map data 142, theoperation server 120 (and/or the remote operator 162) determines whetherthe environmental data 150 comprises an unexpected road condition 156that is not included in the map data 142. Examples of the unexpectedroad conditions 156 are described above.

In response to determining that the environmental data 150 comprises theunexpected road condition 156, the operation server 120 (and/or theremote operator 162) may determine a location coordinate 158 of theunexpected road condition 156, and communicate a command 130 (i.e., anoperation server-to-AV command 132) to the AV 802 a to maneuver to avoidthe unexpected road condition 156.

Communicating a Command from an AV to the Operation Server

In one embodiment, in response to receiving the command 130 from theoperation server 120, the control device 850 (e.g., via thecommunication subsystem 210) may navigate the AV 802 a according to thecommand 130.

In an alternative embodiment, the control device 850 (e.g., via thecommunication subsystem 210) may update the command 130. For example, insome cases, the operation server 120 (and/or the remote operator 162)may not have access to (or may have not yet received) the sensor data148, and determine the command 130 based on comparing the environmentaldata 150 and map data 142. As such, in some cases, the command 130 maynot be an optimal navigation solution for the AV 802 a. In such cases,the control device 850 may update the command 130 based on analyzing thesensor data 148.

To this end, the control device 850 receives the sensor data 148 fromthe sensor 846. By processing the sensor data 148, the control device850 may determine location coordinates of a plurality of objects on andaround the road 102. The control device 850 may update the command 130,such that the updated command 130-1 comprises one or more instructionsto avoid the plurality of objects on and around the road 102 whileperforming the command 130.

For example, assume that the road 102 is closed by the road closure 104.Also assume that the road closure 104 is out of the field-of-view ordetection zone of the sensors 846 of the AV 802 a. The operation server120 may access environmental data 150 indicating that the road 102 isclosed by the road closure 104. From the environmental data 150, theoperation server 120 (and/or the remote operator 162) determines thelocation coordinate of the road closure 104.

The operation server 120 (and/or the remote operator 162) may issue acommand 130 to the AV 802 a that the road 102 is closed ahead, and topull over on a side of the road 102 at a location 114. The controldevice 850 (e.g., via the communication subsystem 210) receives thecommand 130 from the operation server 120. The control device 850 (e.g.,via the communication subsystem 210) also receives the sensor data 148from the sensors 846. By processing the sensor data 148, the controldevice 850 (e.g., via the communication subsystem 210) may determinethat the particular location 114 is occupied by an obstacle. In thiscase, the control device 850 (e.g., via the communication subsystem 210)may update the command 130 to avoid the obstacle on the particularlocation 114. For example, by processing sensor data 148, the controldevice 850 may determine that the location coordinate 116 is free ofobstacles, and update the command 130 to pull the AV 802 a over to thelocation 116 instead of the location 114 as indicated by the command130.

In one embodiment, the control device 850 may perform the updatedcommand 130-1. For example, the control device 850 may navigate the AV802 a according to the updated command 130-1.

In an alternative embodiment, the control device 850 may communicate thesensor data 148 and the updated command 130-1 (i.e., an AV-to-operationserver command 134) to the operation server 120, and await aconfirmation to perform the updated command 130. Upon receiving thesensor data 148 and the updated command 130-1, the operation server 120(and/or the remote operator 162) may analyze the received data, andconfirm, revise, or override the updated command 130-1. The operationserver 130 may then communicate the decision of the operation server 120(and/or the remote operator 162) to the AV 802 a.

Instigating Communicating a Command from an AV to the Operation Server

In some cases, the control device 850 (e.g., via the communicationsubsystem 210) may instigate communicating a proposed command 130 (i.e.,an AV-to-operation server command 134) for navigating the AV 802 a tothe operation server 120. For example, assume that sensors 846 detect anobstacle 118 on the road 102. For example, the obstacle 118 may be anyof a road closure 104, an object 106, and a construction zone 108. Thus,the sensor data 148 may include indications representing the presence ofthe obstacle 118 on the road 102.

The control device 850 analyzes the sensor data 148, and determines thepresence of the obstacle 118 on the road 102. The control device 850compares the sensor data 148 with the map data 142 that includeslocation coordinates of expected objects on and around the road 102.Based on comparing the sensor data 148 and map data 142, the controldevice 850 determines that the obstacle 118 is not included in the mapdata 142. In response, the control device 850 may determine a proposedcommand 130 or a proposed navigation instruction for the AV 802 a toavoid the obstacle 118. For example, the proposed command 130 mayinclude pulling over, diverting to another lane that is not occupied bythe obstacle 118, re-routing, etc.

In one embodiment, the control device 850 may perform the proposedcommand 130.

In an alternative embodiment, the control device 850 may communicate theproposed command 130 (i.e., an AV-to-operation server command 134 (seeFIG. 1)) to the operation server 120 for confirmation or revision by theoperation server 120 (and/or the remote operator 162), as describedabove.

The control device 850 may determine whether the confirmation orrevision is received from the operation server 120. In response toreceiving a confirmation, the control device 850 performs the proposedcommand 130. In response to receiving a revision, the control device 850performs the revised command 130.

In one embodiment, the control device 850 may communicate the sensordata 148 that indicates the presence of the observed obstacle 118, andrequest the remote operator 162 (and/or the operation server 120) toprovide a command 130 to avoid the obstacle 118.

As such, in various embodiments described above, the control device 850may negotiate with the operation server 120 (and/or the remote operator162) to determine a more optimal command 130 for navigating the AV 802 ain response to detecting different obstacle 118 and/or unexpected roadcondition 156.

Communicating a Command from an AV to Another AV

In one embodiment, communicating a command 130 from an AV 802 (e.g., AV802 a) to another AV 802 (e.g., AV 802 b) may be instigated from theoperation server 120. For example, as described above, in response todetecting an unexpected road condition 156 ahead of the AV 802 a, theoperation server 120 (and/or the remote operator 162) may communicate acommand 130 to the AV 802 a to maneuver to avoid the unexpected roadcondition 156. The control device 850 may perform or update the command130, similar to that described above. This command 130 (or the updatedcommand 130-1) may be propagated to one or more following AVs 802, suchas AV 802 b. For example, the operation server 120 may communicate thecommand 130 (or the updated command 130-1) to the AV 802 b, informingthe AV 802 b about the unexpected road condition 156, locationcoordinate 158 of the unexpected road closure 104, and one or morenavigation instructions to avoid the unexpected road condition 156.

In one embodiment, communicating a command 130 from a first AV 802 a toa second AV 802 b may be instigated from the first AV 802 a. Forexample, in response to detecting an unexpected road condition 156and/or an obstacle 118, the control device 850 (e.g., via thecommunication subsystem 210) may determine a proposed command 130 tonavigate the first AV 802 a, similar to that described above. Thecontrol device 850 (e.g., via the communication subsystem 210) maycommunicate the command 130 to the second AV 802 b directly, forexample, if the second AV 802 b is within a V2V communication range ofthe first AV 802 a. This process is described in more detail in FIG. 2,and various scenarios of communicating commands 130 among AVs 802 aredescribed in FIGS. 5-7.

Example Communications Subsystem and its Operation

FIG. 2 illustrates an embodiment of a system 200 that is configured toestablish communications among AVs 802 and operation server 120. In oneembodiment, the system 200 comprises a communication subsystem 210 thatis a component of the control device 850 (see FIG. 8), AV 802 a, andoperation server 120. In some embodiments, the system 200 may furthercomprise an AV 802 b and the network 110. Network 110 establishescommunication among the components of the system 200. The system 200 maybe configured as shown or in any other suitable configurations. Aspectsof an embodiment of certain components of the system 200 are describedabove in FIG. 1, and additional aspects are provided below.

In one embodiment, the network 110 may be implemented using any suitablecloud computing service and network infrastructure, including Amazon WebServices (AWS)®. The network 110 may use any suitable data communicationprotocol to transport data between devices, including Message QueuingTelemetry Transport (MQTT)®. The network 110 may provide one or morefunctionalities, including 1) providing secure connections between theoperation server 120 and the AVs 802; 2) storing data received from anAV 802 (e.g., AV 802 a), such as commands 130, sensor data 148, etc.; 3)providing access to the data communicated between the AV 802 a andoperation server 120; and 4) transferring data among the AVs 802 andoperation server 120.

Control device 850 comprises a plurality of components, including thecommunication subsystem 210 operably coupled with a computing device260. Other components of the control device 850 are described in FIG. 8.The corresponding description below describes components of thecommunication subsystem 210.

Communication subsystem 210 is provided to facilitate data communicationbetween an AV 802 (e.g., AV 802 a) and other components of the system200. In some embodiments, the communication subsystem 210 may include acontroller area network (CAN) controller to establish communicationsamong the components within the communication subsystem 210. Thecommunication subsystem 210 may include various components that supportthe operation of the communication subsystem 210. The communicationsubsystem 210 includes at least one processor 212 in signalcommunication with at least one memory 242. Memory 242 stores softwareinstructions 244 that when executed by the processor 212 cause theprocessor 212 to perform one or more functions described herein. Forexample, when the software instructions 244 are executed, the processor212 receives a command 130 from the operation server 120 and/or thefollowing AV 802 b, and implements the command 130. In another example,when the software instructions 244 are executed, upon receiving acommand 130 from the operation server 120 and/or the following AV 802 b,the processor 212 updates the command 130, communicates the updatedcommand 130 to the operation server 120 and/or the following AV 802 b,and upon receiving a confirmation (or revision) implements the command130. The communication subsystem 210 may further comprise at least onesensor unit 224, a Radio Frequency (RF) gateway 228, a Long TermEvolution (LTE) modem 232, and a V2V modem 234.

Processor 212 comprises one or more processors, such as computing units214 and vehicle control unit 222. The processor 212 is operably coupledto the sensor units 224, RF gateway 228, LTE modem 230, V2V modem 234,and memory 242. The processor 212 is any electronic circuitry including,but not limited to, state machines, one or more central processing unit(CPU) chips, logic units, cores (e.g. a multi-core processor),field-programmable gate array (FPGAs), application specific integratedcircuits (ASICs), or digital signal processors (DSPs). The processor 212may be a programmable logic device, a microcontroller, a microprocessor,or any suitable combination of the preceding. The processor 212 isconfigured to process data and may be implemented in hardware and/orsoftware. For example, the processor 212 may be 8-bit, 16-bit, 32-bit,64-bit or of any other suitable architecture. The processor 212 mayinclude an arithmetic logic unit (ALU) for performing arithmetic andlogic operations, processor registers that supply operands to the ALUand store the results of ALU operations, and a control unit that fetchesinstructions from memory and executes them by directing the coordinatedoperations of the ALU, registers and other components. The one or moreprocessors are configured to implement various instructions. Forexample, the one or more processors are configured to execute softwareinstructions 244 to implement the functions disclosed herein, such assome or all of those described with respect to FIGS. 1-10. In someembodiments, the function described herein is implemented using logicunits, FPGAs, ASICs, DSPs, or any other suitable hardware or electroniccircuitry.

Each computing unit 214 may be implemented by the processor 212executing the software instructions 244, and is generally configured tosupport autonomous driving functions and facilitate data communicationbetween the AV 802 a and other components of the system 200.

In one embodiment, the computing units 214 are redundant backups foreach other. The processor 212 may include any suitable number ofcomputing units 214, such as one, two, three, etc. Each computing unit214 may perform one or more functions of the communication subsystem 210(or the control device 850) described in FIG. 1, including 1) receivingcommands 130, including broad 130 a, specific 130 b, and configurationcommands 130, from the operation server 120 and/or a following AV 802 b;2) sending commands 130 to the operation server 120 and/or the followingAV 802 b; 3) communicating a location coordinate of the AV 802 a to theoperation server 120 and/or the following AV 802 b; 4) gathering healthinformation of the components (e.g., hardware and software components)of the control device 850, where the health information of a componentof the control device 850 indicates a performance status of thatcomponent, such as memory utilization percentage, processor utilizationpercentage, an average response time per second, an average error rateper minute, etc.; and 5) communicating the health information of thecomponents of the control device 850 to the operation server 120 and/orthe following AV 802 b.

Each computing unit 214 may comprise an LTE agent 216, a V2V agent 218,and a Human Machine Interface (HMI) agent 220.

LTE agent 216 may be implemented in software and/or hardware module, andis generally configured to establish communication between the AV 802 aand the operation server 120 via the network 110.

V2V agent 218 may be implemented in software and/or hardware module, andis generally configured to receive commands 130 from the AV 802 b, andtransmit commands 130 to the following AV 802 b using the V2V modem 234.

HMI agent 220 may be a software and/or hardware module, and is generallyconfigured to establish communication with the following AV 802 b toprovide a visitor mode HMI service, such that an operator is able toaccess the control device 850 of the AV 802 a from the computing device260 on the AV 802 b.

Each sensor unit 224 may be implemented in a software and/or hardwaremodule. For example, each sensor unit 224 may be implemented on one ormore microprocessors. Each sensor unit 224 is generally configured toperform one or more functions, including 1) gathering sensor data 148from one or more sensors 846; 2) generating a timestamp when each sensordata 148 is received; 3) processing the sensor data 148 for detectingobjects, e.g., using obstacle detection instructions 246; and 4) sendingthe processed sensor data 148 to the processor 212.

In one embodiment, the sensor unit 224 may process the sensor data 148to determine and identify objects indicated in the sensor data 148. Forexample, to determine or identify objects indicated in the sensor data148, the sensor unit may use obstruction detection instructions 246. Thesensor unit 224 may use the obstruction detection instructions 246 todetermine if an object is detected in the sensor data 148 (e.g., inimage/video feeds, LiDAR data feeds, motion sensor data feeds, infrareddata feeds, etc.). For example, the obstruction detection instructions246 may include code for implementing object detection methods from thefeed of images corresponding to frames of videos (e.g., detectingobjects from images or videos). Similarly, the obstruction detectioninstructions 246 may include code for detecting objects from LiDAR data,motion sensor data (e.g., detecting motions of the objects), sounds(e.g., detecting sounds near the AV 802 a), and infrared data (e.g.,detecting objects in infrared images). The obstruction detectioninstructions 246 may include code for detecting objects using other datatypes as well. In one embodiment, the sensor units 224 are redundantbackups for each other. The communication subsystem 210 may include anysuitable number of sensor units 224, such as one, two, three, etc.

Vehicle control unit 222 may be implemented in software and/or hardwaremodule, and is generally configured to implement a command 130 receivedeither from the operation server 120 or another AV 802 (e.g., AV 802 b)and send the status of the process of implementing the command 130 tothe processor 212.

LTE modem 232 may be implemented in software and/or hardware module, andis generally configured to provide Internet connectivity to thecommunication subsystem 210, for example, through the network 110. TheLTE modem 232 is configured to enable wired and/or wirelesscommunications. The LTE modem 232 may be referred to as a first networkinterface. The LTE modem 232 is further configured to communicate databetween the communication subsystem 210 and other devices, systems(e.g., AV 802 b), servers (e.g., operation server 120), or domain(s).For example, the LTE modem 232 may comprise a WIFI interface, a localarea network (LAN) interface, a wide area network (WAN) interface, amodem, a switch, or a router.

The processor 212 is configured to send and receive data using the LTEmodem 232 to other devices, such as the operation server 120. The LTEmodem 232 may be configured to use any suitable type of communicationprotocol. The LTE modem 232 may provide data security to thecommunication subsystem 210 by providing firewall functionality. Forexample, the LTE modem 232 may block or filter data communications fromunauthorized or unknown sources, and allow data communications from theoperation server 120 and other AVs 802. As such, outsiders may not beable to access the AV 802 a and its components.

V2V modem 234 may be implemented in software and/or hardware module, andis generally configured to establish communication channels among AVs802. For example, the AV 802 a may transmit commands 130 (or any otherdata/instruction) to the following AV 802 b using the V2V modem 234. Theprocessor 212 is configured to send and receive data using the V2V modem234 to other devices, such as other AVs 802, e.g. AV 802 b. The V2Vmodem 234 may be referred to as a second network interface.

RF gateway 228 may be implemented in software and/or hardware module,and is generally configured to bridge communications between the vehiclecontrol unit 222 and V2V modem 234. For example, the vehicle controlunit 222 may support CAN connections (e.g., using CAN connectors), andthe V2V modem 234 may support Ethernet connections (e.g., using Ethernetports). Thus, the RF gateway 228 may be used to transfer data betweenthe CAN connectors of the vehicle control unit 222 and Ethernet ports ofthe V2V modem 234.

The RF gateway 228 may comprise a V2V agent 230. The V2V agent 230 maybe implemented in software and/or hardware module, and is generallyconfigured to receive commands 130 (or any other data/instruction) fromthe following AV 802 b, via the V2V modem 234.

Memory 242 stores any of the information described with respect to FIGS.1-10 along with any other data, instructions, logic, rules, or codeoperable to implement the function(s) described herein when executed byprocessor 212. For example, the memory 242 may store softwareinstructions 244, obstacle detection instructions 246, sensor data 148,commands 130, and/or any other data/instructions. The softwareinstructions 244 include code that when executed by the processor 212causes the communication subsystem 210 to perform the functionsdescribed herein, such as some or all of those described in FIGS. 1-10.The memory 242 comprises one or more disks, tape drives, or solid-statedrives, and may be used as an over-flow data storage device, to storeprograms when such programs are selected for execution, and to storeinstructions and data that are read during program execution. The memory242 may be volatile or non-volatile and may comprise read-only memory(ROM), random-access memory (RAM), ternary content-addressable memory(TCAM), dynamic random-access memory (DRAM), and static random-accessmemory (SRAM). The memory 242 may include one or more of a localdatabase, cloud database, network-attached storage (NAS), etc.

Computing device 260 is generally any device that is configured toprocess data and interact with users. Examples of computing device 260include, but are not limited to, a personal computer, a desktopcomputer, a workstation, a server, a laptop, a tablet computer, etc. Thecomputing device 260 is configured to execute a software applicationthat is configured to provide a monitoring interface to a user tomonitor sensor data 148, commands 130, and/or any otherdata/instruction. In one embodiment, the computing device 260 may beconfigured to not allow control of the AV 802 to mitigate unauthorizedaccess and control of the AV 802 through the computing device 260.

Communications Among Components of the Communication Subsystem

In some embodiments, the processor 212 and its components may beconfigured to connect to other components of the communication subsystem210 using wired and/or wireless communications. For example, thecomputing units 214 may be configured to establish communication withother components of the communication subsystem 210 using wired and/orwireless communications.

Each computing unit 214 establishes a separate communication channelwith the operation server 120 and/or the following AV 802 a, via thenetwork 110. The communication subsystem 210 may periodically (e.g.,every 0.02 of a second, every 0.5 of a second, or any other suitableduration) communicate messages or acknowledgments between the computingunits 214 and the operation server 120 to detect loss of communication.

Each computing unit 214 connects to the network 110 through the LTEmodem 232. Each computing unit 214 may connect to the LTE modem 232using an Ethernet switch. Each computing unit 214 may be connected tothe vehicle control unit 222 using CAN connectors. Each computing unit214 may be connected to the V2V modem 234 using Ethernet connections.

In the AV 802 a, each computing unit 214 and the RF gateway 228 mayestablish a separate communication channel with a computing device 260on the AV 802 b. The communication subsystem 210 may periodically (e.g.,every 0.02 second, every 0.5 second, or any other suitable duration)communicate messages between the RF gateway 228 and the computing device260 on the AV 802 b to detect loss of communication.

Communications Among AVs and the Operation Server Transitioning to“Connected to the Operation Server and a Following AV” State

Upon igniting or powering on the engine 842 a of the AV 802 a (see FIG.8), the components of the communication subsystem 210 are initialized.The components of the processor 212, including the computing units 214and vehicle control unit 222 establish communication channels to theoperation server 120 and/or the following AV 802 b. In this manner, thecommunication subsystem 210 enters a “connected to operation server anda following AV” state. In this state, the operation server 120 (or theremote operator 162 (see FIG. 1) is able to monitor operations of the AV802 a and issue commands 130, similar to that described above in FIG. 1.

Transitioning to “Connected to the Following AV” State

The communication subsystem 210 transitions to the “connected to thefollowing AV” state when the communication channel 270 with theoperation server 120 is lost. The loss of communication channel 270 withthe operation server 120 is detected based on a periodic acknowledgmentmessage (or lack of the periodic acknowledgment message) between the RFgateway 228 and computing device 260 at the following AV 802 b, asdescribed above.

As such, the AV 802 a can be tracked, can be sent commands 130 (andreceive commands 130 from), its autonomous operations can be monitoredeven if communication between the AV 802 a and the operation server 120is lost. For example, if the periodic acknowledgment message is notreceived at its corresponding periodic interval from the operationserver 120, the communication subsystem 210 determines that thecommunication channel 270 with the operation server 120 is lost. Inresponse, the communication subsystem 210 may transition to the“connected to the following AV” state where the AV 802 a is connected tothe following AV 802 b through a second communication channel 280.

Transitioning to “Connected to the Operation Server” State

The communication subsystem 210 transitions to the “connected to theoperation server” state when the communication channel 280 with thefollowing AV 802 b is lost. The loss of communication channel 280 withthe following AV 802 b is detected based on a periodic acknowledgmentmessage (or lack of the periodic acknowledgment message) between thecomputing units 214 and the operation server 120. In this state, the AV802 a can maintain the connection with the operation server 120 as longas the AV 802 a can connect to the network 110, e.g., using the LTEmodem 232.

As such, the AV 802 a can be tracked, can be sent commands 130 (andreceive commands 130 from), its autonomous operations can be monitoredeven if communication between the AV 802 a and the following AV 802 b islost. For example, if the periodic acknowledgment message is notreceived at its corresponding periodic interval from the following AV802 b, the communication subsystem 210 determines that the communicationchannel 280 with the following AV 802 b is lost. In response, thecommunication subsystem 210 may transition to the “connected to theoperation server” state where the AV 802 a is connected to the operationserver 120 through the communication channel 270.

Transitioning to “Executing a Command without Connections with theOperation Server and Following AV” State

The communication subsystem 210 transitions to the “executing a commandwithout connections with the operation server and following AV” statewhen the communications with the operation server 120 and following AV802 b are lost, i.e., communication channels 270 and 280 are lost. Inthis state, the processor 212 may execute a command 130 to pull over theAV 802 a on a side of a road until the communication subsystem 210establishes a communication with either or both of the operation server120 and the following AV 802 b. As such, even if communications withboth of the operation server 120 and the following AV 802 b are lost,the communication subsystem 210 can perform a command 130 to pull overuntil communication with either or both of the operation server 120 andthe following AV 802 b is reestablished.

Example Method for Communicating a Command to an AV

FIG. 3 illustrates an example flowchart of a method 300 forcommunicating a command 130 to an AV 802. Modifications, additions, oromissions may be made to method 300. Method 300 may include more, fewer,or other steps. For example, steps may be performed in parallel or inany suitable order. While at times discussed as the AV 802, operationserver 120, control device 850, communication subsystem 210, orcomponents of any of thereof performing steps, any suitable system orcomponents of the system may perform one or more steps of the method300. For example, one or more steps of method 300 may be implemented, atleast in part, in the form of software instructions 138, 244, and 880,respectively, from FIGS. 1, 2, and 8, stored on non-transitory,tangible, machine-readable media (e.g., memories 128, 242, 890, and1002, respectively, from FIGS. 1, 2, 8, and 10) that when run by one ormore processors (e.g., processors 122, 212, 870, 1004, respectively,from FIGS. 1, 2, 8, and 10) may cause the one or more processors toperform steps 302-310.

Method 300 begins at step 302 where the operation server 120 accessesenvironmental data 150 associated with a road 102 ahead of the AV 802 a,where the environmental data 150 comprises weather data 152 and trafficdata 154 associated with a time window during which the AV 802 a istraveling along the road 102. For example, the operation server 120 mayreceive the environmental data 150 from one or more external sources,such as live weather reporting news, live traffic reporting news, etc.

At step 304, the operation server 120 compares the environmental data150 with the map data 142 that comprises expected road conditions aheadof the AV 802. For example, the expected road conditions may comprisepredicted weather and traffic congestions ahead of the AV 802 a on theroad 102.

At step 306, the operation server 120 determines whether theenvironmental data 150 comprises an unexpected road condition 156 thatis not included in the map data 142. The unexpected road conditions 156may comprise an unexpected weather condition, unexpected trafficcongestion, unexpected road closure 104, unexpected object 106,unexpected construction zone 108, among others. For example, based oncomparing the environmental data 159 with the map data 142, theoperation server 120 may determine whether the environmental data 150comprises an unexpected road condition 156. The remote operator 162 mayconfirm, revise, or override the determination of the operation server120, similar to that described above in FIG. 1. If it is determined thatthe environmental data 150 comprises an unexpected road condition 156that is not included in the map data 142, method 300 proceeds to step308. Otherwise, method 300 terminates.

At step 308, the operation server 120 determines a location coordinate158 of the unexpected road condition 156. For example, the operationserver 120 may determine the location coordinate 158 of the unexpectedroad condition 156 from the environmental data 150, similar to thatdescribed above in FIG. 1.

At step 310, the operation server 120 communicates a command 130 (or anoperation server-to-AV command 132) to the AV 802 a to maneuver to avoidthe unexpected road condition 156. The command 130 may be a broadcommand 130 a or a specific command 130 b. Examples of broad command 130a and specific commands 130 b are described in FIG. 1.

Example Method for Navigating an AV Based on a Received Command

FIG. 4 illustrates an example flowchart of a method 400 for navigatingan AV 802 based on a received command 130. Modifications, additions, oromissions may be made to method 400. Method 400 may include more, fewer,or other steps. For example, steps may be performed in parallel or inany suitable order. While at times discussed as the AV 802, operationserver 120, control device 850, communication subsystem 210, orcomponents of any of thereof performing steps, any suitable system orcomponents of the system may perform one or more steps of the method400. For example, one or more steps of method 400 may be implemented, atleast in part, in the form of software instructions 138, 244, and 880,respectively, from FIGS. 1, 2, and 8, stored on non-transitory,tangible, machine-readable media (e.g., memories 128, 242, 890, and1002, respectively, from FIGS. 1, 2, 8, and 10) that when run by one ormore processors (e.g., processors 122, 212, 870, 1004, respectively,from FIGS. 1, 2, 8, and 10) may cause the one or more processors toperform steps 402-412.

Method 400 begins at step 402 where the control device 850 (e.g., viathe communication subsystem 210) associated with an AV 802 (e.g., AV 802a of FIG. 1) receives, from the operation server 120, a command 130 tonavigate the AV 802 to avoid an unexpected road condition 156, includingunexpected road conditions 156 described in FIG. 1.

At step 404, the control device 850 (e.g., via the communicationsubsystem 210) receives, from vehicle sensors 846, sensor data 148comprising location coordinates of a plurality of objects ahead of theAV 802. The sensor data 148 may further comprise indications describingthe identity of the plurality of objects. For example, the sensor data148 may indicate the presence of vehicles, pedestrians, obstacles 118,lane markings, road boundaries, road signs, etc., on and around the road102 of FIG. 1.

At step 406, the control device 850 (e.g., via the communicationsubsystem 210) determines whether any object from the plurality ofobjects indicated in the sensor data 148, impedes performing the command130. For example, the control device 850 (e.g., via the communicationsubsystem 210) may determine whether an object from the plurality ofobjects occupies a traveling path of the AV 802 a, such that it impedesnavigating the AV 802 a according to the command 130. If it isdetermined that an object from the plurality of objects impedesperforming the command 130, method 400 proceeds to step 410. Otherwise,method 400 proceeds to step 408.

At step 408, the control device 850 navigates the AV 802 a according tothe command 130. For example, assuming that the command 130 is to pullover the AV802 a at the location coordinate 114, the control device 850pulls over the AV 802 a at the location coordinate 114, similar to thatdescribed in FIG. 1.

At step 410, the control device 850 (e.g., via the communicationsubsystem 210) updates the command 130, such that the updated command130-1 comprises one or more navigation instructions to avoid theplurality of objects while performing the command 130. For example,assuming that the command 130 is to pull over the AV 802 a at thelocation coordinate 114, if the control device 850 determines that thespot with the location coordinate 114 is occupied by an obstacle orobject, the control device 850 (e.g., via the communication subsystem210) updates the command 130 to pull over the AV 802 a at the locationcoordinate 116, similar to that described in FIG. 1.

At step 412, the control device 850 navigates the AV 802 a according tothe updated command 130-1.

First Example System for Communicating Commands Among Two or More AVs

FIG. 5 illustrates an embodiment of a system 500 for communicatingcommands 130 among two or more AVs 802. FIG. 5 further illustrates asimplified schematic diagram of the road 102 traveled by the AVs 802including, the lead AV 802 a, the first following AV 802 b, and thesecond following AV 802 n. In FIG. 5, the AVs 802 are heading toward anunexpected road condition 156, similar to that described in FIG. 1. Inone embodiment, system 500 comprises the operation server 120, the leadAV 802 a, and the first following AV 802 b. In some embodiments, system500 further comprises the second following AV 802 n and the network 110.Network 110 enables communications among components of system 500. Thesystem 500 may be configured as shown or in any other suitableconfigurations.

As illustrated in FIG. 5, the lead AV 802 a, following AV 802 b, andfollowing AV 802 n are in a V2V communication range 510. Although, threeAVs 802 are illustrated in FIG. 5, in light of this disclosure one ofordinary skill in the art would appreciate that any number of AVs 802can be in the V2V communication range 510. The V2V communication range510 may correspond to a threshold distance range of the operation of theV2V modem 234 implemented in the communication subsystem 210 describedin FIG. 2. As such, using the V2V modems 234 (see FIG. 2), the AVs 802can communicate data, including commands 130, with one another. Thecorresponding description below describes communicating commands 130among the AVs 802 in the V2V communication range 510.

Communicating a Command to a First Following AV

In general, system 500 (at the lead AV 802 a) receives a command 130(e.g., an operation server-to-AV command 132) to navigate the lead AV802 a to avoid an unexpected road condition 156 ahead of the lead AV 802a. For example, the lead AV 802 a may receive the command 130, inresponse to the operation server 120 detecting the unexpected roadcondition 156 in the environmental data 150 a associated with a portionof the road 102 ahead of the lead AV 802 a, similar to that described inFIG. 1.

The control device 850 a, associated with the lead AV 802 a, receivessensor data 148 a from the sensors 846, where the sensor data 148 acomprises location coordinates of a first plurality of objects ahead ofthe lead AV 802 a. For example, the sensor data 148 a may includelocation coordinates of other vehicles, road signs, lane markings, roadboundaries, traffic lights, among any other object that the sensors 846may detect. The control device 850 a may be an instance of controldevice 850 described in FIG. 8. The control device 850 a may send andreceive commands 130 via the communication subsystem 210 described inFIG. 2. The control device 850 a (e.g., via the communication subsystem210 (see FIG. 2)) may or may not update the command 130 for navigatingthe lead AV 802 a, based on analyzing the sensor data 148 a, similar tothat described in FIGS. 1 and 2. The control device 850 a may determineand communicate a command 130-1 (e.g., an AV-to-AV command 136) to thefollowing AV 802 b, as described below.

The control device 850 a accesses environmental data 150 b associatedwith a portion of the road 102 between the lead AV 802 a and thefollowing AV 802 b. Since the lead AV 802 a has traveled the portion ofroad 102 between the lead AV 802 a and the following AV 802 b, the leadAV 802 a has experienced and recorded the environmental data 150 b. Theenvironmental data 150 b may comprise location coordinates of a secondplurality of objects between the lead AV 802 a and the following AV 802b. The environmental data 150 b may further comprise road safetyregulation data, data related to obstacles 118 (see FIG. 1), among anyother data that the lead AV 802 a has experienced and recorded whiletraveling the portion of road 102 between the lead AV 802 a and thefollowing AV 802 b. The environmental data 150 b is associated with atime window during which the following AV 802 b is traveling along theroad 102.

The control device 850 a determines whether at least one object detectedin any of the sensor data 148 a and environmental data 150 a and 150 bimpedes performing the command 130 by the following AV 802 b. Forexample, the control device 850 a may receive the trajectory of thefollowing AV 802 b (e.g., from the operation server 120 and/or thefollowing AV 802 b), and determine whether any object detected in any ofthe sensor data 148 a and environmental data 150 a and 150 b is on atraveling pathway of the following AV 802 b. In another example, thecontrol device 850 a may determine the trajectory of the following AV802 b using sensors 846, similar to that described in FIG. 8. Thecontrol device 850 a may determine that an object impedes performing thecommand 130 by the following AV 802 b, if the object is on the travelingpathway of the following AV 802 b.

In response to determining that at least one object (detected in any ofthe sensor data 148 a and environmental data 150 a and 150 b) impedesperforming the command 130 by the following AV 802 b, the control device850 a updates the command 130 for the following AV 802 b. In thisprocess, the control device 850 a generates the updated command 130-1(e.g., an AV-to-AV command 136). The updated command 130-1 comprises oneor more navigation instructions for the following AV 802 b to avoid atleast one object detected on the traveling pathway of the following AV802 b while performing the command 130. The control device 850 acommunicates the updated command 130-1 to the following AV 802 b.

The control device 850 b, associated with the following AV 802 b,receives the updated command 130-1, and navigates the AV 802 b accordingto the updated command 130-1. The control device 850 b may be aninstance of the control device 850 described in FIG. 8.

In one embodiment, the control device 850 b may further update thecommand 130-1, in response to determining that an object detected in thesensor data 148 b impedes performing the command 130-1, similar to thatdescribed above in FIGS. 1 and 2.

Communicating a Command to a Second Following AV

Similar to that described above, the control device 850 a may generatethe updated command 130-2, and communicate the updated command 130-2 tothe second following AV 802 n that is in the V2V communication range 510of the lead AV 802 a. In this process, the control device 850 a accessesthe environmental data 150 associated with a portion of the road 102between the lead AV 802 a and the second following AV 802 n. Theenvironmental data 150 associated with a portion of the road 102 betweenthe lead AV 802 a and the second following AV 802 n may include theaggregate of environmental data 150 b and 150 n. The aggregate ofenvironmental data 150 b and 150 n may include location coordinates of aplurality of objects between the lead AV 802 a and the second followingAV 802 n. The aggregate of environmental data 150 b and 150 n mayfurther comprise road safety regulation data, data related to obstacles118 (see FIG. 1), among any other data that the lead AV 802 a hasexperienced and recorded while traveling the portion of the road 102between the lead AV 802 a and the second following AV 802 n. Theaggregate of environmental data 150 b and 150 n is associated with atime window during which the second following AV 802 n is travelingalong the road 102.

The control device 850 a determines whether at least one object detectedin any of the sensor data 148 a and environmental data 150 a, 150 b, and150 n impedes performing the command 130 by the second following AV 802n. For example, the control device 850 a may receive the trajectory ofthe second following AV 802 n (e.g., from the operation server 120and/or the following AV 802 n), and determine whether an object detectedin any of the sensor data 148 a and environmental data 150 a, 150 b, and150 n is on a traveling pathway of the second following AV 802 n.

In response to determining that at least one object (detected in any ofthe sensor data 148 a and environmental data 150 a, 150 b, and 150 n)impedes performing the command 130 by the second following AV 802 n, thecontrol device 850 a updates the command 130 for the second following AV802 n. In this process, the control device 850 a generates the secondupdated command 130-2 by updating the command 130-1. The second updatedcommand 130-2 comprises one or more navigation instructions for thesecond following AV 802 n to avoid the at least one object detected onthe traveling pathway of the second following AV 802 n while performingthe command 130-1. The control device 850 a communicates the secondupdated command 130-2 (e.g., an AV-to-AV command 136) to the secondfollowing AV 802 n, so that the AV 802 n can be navigated according tothe command 130-2 to avoid the unexpected road condition 156 and objectson its traveling pathway.

In this manner, the lead AV 802 a may update and communicate a command130 to an n-th following AV 802, according to the sensor data 148 a,environmental data 150 a, and the aggregate of correspondingenvironmental data 150 between the lead AV 802 a and the n-th followingAV 802.

In one embodiment, any of the AVs 802 (e.g., AVs 802 a-n) may furtherupdate or revise a received command 130 (or updated command 130-1,130-2) based on analyzing their corresponding sensor data 148, similarto that described in FIGS. 1 and 2.

In one embodiment, any of the AVs 802 (e.g., AVs 802 a-n) may send areceived command 130 (or updated command 130-1, 130-2) to the operationserver 120 and request further instructions, similar to that describedin FIGS. 1 and 2.

In one embodiment, any of the AVs 802 (e.g., AVs 802 a-n) may send areceived command 130 (or updated commands 130-1, 130-2) to the operationserver 120 to request for confirmation, similar to that described inFIGS. 1 and 2.

In one embodiment, the AV 802 b may be the lead AV 802 in V2Vcommunication range 510 with one or more AVs 802 traveling behind the AV802 b.

As further illustrated in FIG. 5, while the AVs 802 (e.g., AVs 802 a-n)are traveling along the road 102, the AVs 802 communicate theircorresponding sensor data 148 to the operation server 120. For example,the lead AV 802 a communicates sensor data 148 a, the following AV 802 bcommunicates sensor data 148 b, and the second following AV 802 ncommunicates sensor data 148 n to the operation server 120, similar tothat described in FIGS. 1 and 2. The operation server 120 may use thesensor data 148 a-n, to confirm, revise, or override the determinationof any of the control devices 850 a-n with respect to commands 130,130-1, and 130-2 or any navigation solution, similar to that describedin FIGS. 1 and 2.

Second Example System for Communicating Commands Among Two or More AVs

FIG. 6 illustrates an embodiment of a system 600 for communicatingcommands 130 among two or more AVs 802. FIG. 6 further illustrates asimplified schematic of the road 102 traveled by the AVs 802, includingthe lead AV 802 a, the first following AV 802 b, and the secondfollowing AV 802 c. In FIG. 6, the AVs 802 are heading toward anunexpected road condition 156, similar to that described in FIG. 1. Inone embodiment, system 600 comprises the operation server 120, the leadAV 802 a, and the first following AV 802 b. In some embodiments, system600 further comprises the second following AV 802 c and the network 110.Network 110 enables communications among components of system 600. Thesystem 600 may be configured as shown or in any other suitableconfigurations.

As illustrated in FIG. 6, the lead AV 802 a and the first following AV802 b are in a first V2V communication range 510 from each other, andthe first following AV 802 b and the second following AV 802 c are in asecond V2V communication range 510 from each other. The AVs 802 that arein a V2V communication range 510 can communicate data, includingcommands 130, with each other. FIG. 6 illustrates a scenario in whichvarious sets of AVs 802 are in different V2V communication ranges 510.The corresponding description below described communicating commands 130among AVs 802 in different V2V communication ranges 510.

Communicating a Command to a First Following AV

The process of the lead AV 802 a communicating the updated command 130-1(e.g., an AV-to-AV command 136) to the following AV 802 b may be similarto that described in FIG. 5. In this process, the lead AV 802 a receivesa command 130 to avoid an unexpected road condition 156 ahead of thelead AV 802 a, where the command 130 is issued in response to detectingthe unexpected road condition 156 in the environmental data 150 a. Thecontrol device 850 a, associated with the lead AV 802 a, receives sensordata 148 a from the sensors 846, where the sensor data 148 a compriseslocation coordinates of a first plurality of objects ahead of the leadAV 802 a. The control device 850 a accesses environmental data 150 bassociated with a portion of the road 102 between the lead AV 802 a andthe following AV 802 b. The control device 850 a determines whether atleast one object detected in any of the sensor data 148 a andenvironmental data 150 a and 150 b impedes performing the command 130 bythe following AV 802 b. In response to determining that at least oneobject (detected in any of the sensor data 148 a and environmental data150 a and 150 b) impedes performing the command 130 by the following AV802 b, the control device 850 a generates the updated command 130-1 byupdating the command 130, such that the updated command 130-1 comprisesone or more navigation instructions for the following AV 802 b to avoidthe at least one object detected on the traveling pathway of thefollowing AV 802 b while performing the command 130. The control device850 a communicates the updated command 130-1 to the following AV 802 b.Upon receiving the updated command 130-1, the control device 850 b maynavigate the AV 802 b according to the updated command 130-1.

In scenarios where a particular AV 802 is not in the V2V communicationrange 510 of the lead AV 802 a, the particular AV 802 may receive acommand 130 to avoid the unexpected road condition 156 from theoperation server 120 (similar to that described in FIGS. 1 and 2) and/orfrom another AV 802 that is in the V2V communication range 510 from theparticular AV 802, as described below. In FIG. 6, the second followingAV 802 c is not in the V2V communication range 510 of the lead AV 802 a,however, the second following AV 802 c is in the V2V communication range510 of the first following AV 802 b. Thus, the second following AV 802 cmay receive a command 130-2 to avoid the unexpected road condition 156from the first following AV 802 b. This process is described below.

Communicating a Command to a Second Following AV

To generate the command 130-2 (e.g., an AV-to-AV command 136) for thesecond following AV 802 c, the control device 850 b may access theenvironmental data 150 c associated with a portion of the road 102between the AV 802 b and the AV 802 c. The environmental data 150 c maycomprise location coordinates of a plurality of objects between the AV802 b and the AV 802 c. The environmental data 150 c may furthercomprise road safety regulation data, data related to obstacles 118 (seeFIG. 1), among any other data that the AV 802 b has experienced andrecorded while traveling the portion of the road 102 between the AV 802b and the AV 802 c. The environmental data 150 c is associated with atime window during which the second following AV 802 c is travelingalong the road 102. The control device 850 b may further access andanalyze sensor data 148 b, similar to that described in FIG. 5 withrespect to control device 850 a.

The control device 850 b determines whether at least one object detectedin any of the sensor data 148 b and environmental data 150 a, 150 b, and150 c impedes performing the command 130-1 by the AV 802 c. For example,the control device 850 b may receive the trajectory of the AV 802 c(e.g., from the operation server 120 and/or the AV 802 c), and determinewhether an object detected in any of the sensor data 148 b andenvironmental data 150 a, 150 b, and 150 c is on the traveling pathwayof the AV 802 c. In response to determining that at least one object(detected in any of the sensor data 148 b and environmental data 150 a,150 b, and 150 c) impedes performing the command 130-1 by the AV 802 c,the control device 850 b generates the command 130-2 by updating thecommand 130-1, such that the command 130-2 comprises one or morenavigation instructions for the AV 802 c to avoid at least one objectdetected on the traveling pathway of the AV 802 c while performing thecommand 130-1. The control device 850 b communicates the command 130-2to the AV 802 c, so that the AV 802 c can be navigated according to thecommand 130-2 to avoid the unexpected road condition 156 and objects onits traveling pathway.

In one embodiment, any of the AVs 802 (e.g., AVs 802 a-c) may furtherupdate or revise a received command 130 (or updated command 130-1,130-2) based on analyzing their corresponding sensor data 148, similarto that described in FIGS. 1 and 2.

In one embodiment, any of the AVs 802 (e.g., AVs 802 a-c) may send areceived command 130 (or updated command 130-1, 130-2) to the operationserver 120 and request further instructions, similar to that describedin FIGS. 1 and 2.

In one embodiment, any of the AVs 802 (e.g., AVs 802 a-c) may send areceived command 130 (or updated command 130-1, 130-2) to the operationserver 120 to request for confirmation, similar to that described inFIGS. 1 and 2.

As further illustrated in FIG. 6, while the AVs 802 (e.g., AVs 802 a-c)are traveling along the road 102, the AVs 802 communicate theircorresponding sensor data 148 to the operation server 120. For example,the lead AV 802 a communicates sensor data 148 a, the following AV 802 bcommunicates sensor data 148 b, and the second following AV 802 ccommunicates sensor data 148 c to the operation server 120, similar tothat described in FIGS. 1 and 2. The operation server 120 may use thesensor data 148 a-c, to confirm, revise, or override the determinationof any of the control devices 850 a-c with respect to commands 130,130-1, and 130-2 or any navigation solution, similar to that describedin FIGS. 1 and 2.

Although, three AVs 802 are illustrated in FIG. 6, this disclosurecontemplates any number of AVs 802 on a road 102 communicating commands130 (or updated commands 130-1, 130-2, etc.) to one or more other AVs802. As such, this disclosure contemplates one-to-one, one-to-many, andmany-to-many communications among the network mesh of AVs 802 and theoperation server 120.

Example Method for Communicating Commands Among AVs

FIG. 7 illustrates an example flowchart of a method 700 forcommunicating commands 130 among AVs 802. Modifications, additions, oromissions may be made to method 700. Method 700 may include more, fewer,or other steps. For example, steps may be performed in parallel or inany suitable order. While at times discussed as the AV 802, operationserver 120, control devices 850, communication subsystems 210, orcomponents of any of thereof performing steps, any suitable system orcomponents of the system may perform one or more steps of the method700. For example, one or more steps of method 700 may be implemented, atleast in part, in the form of software instructions 138, 244, and 880,respectively, from FIGS. 1, 2, and 8, stored on non-transitory,tangible, machine-readable media (e.g., memories 128, 242, 890, and1002, respectively, from FIGS. 1, 2, 8, and 10) that when run by one ormore processors (e.g., processors 122, 212, 870, 1004, respectively,from FIGS. 1, 2, 8, and 10) may cause the one or more processors toperform steps 702-714.

Method 700 begins at step 702 where a control device 850 a, associatedwith a lead AV 802 a, receives a command 130 to navigate the lead AV 802a to avoid an unexpected road condition 156. The control device 850 amay receive the command 130 via the communication subsystem 210described in FIG. 2. For example, the control device 850 a may receivethe command 130 from the operation server 120, in response to theoperation server 120 detecting the unexpected road condition 156 in theenvironmental data 150 a associated with a portion of the road 102 aheadof the lead AV 802 a, similar to that described in FIGS. 1, 5, and 6.

At step 704, the control device 850 a receives, from sensors 846associated with the lead AV 802 a, sensor data 148 a, where the sensordata 148 a comprises location coordinates of a first plurality ofobjects ahead of the lead AV 802 a. For example, the control device 850a may be triggered to receive the sensor data 148 a from the sensors846, in response to receiving the command 130. In another example, thecontrol device 850 a may receive the sensor data 148 a periodically(e.g., every 0.02 of a second, every 0.5 of a second, or any othersuitable duration), similar to that described in FIG. 2.

At step 706, the control device 850 a accesses environmental data 150 bassociated with a portion of the road 102 between the lead AV 802 a anda following AV 802 b. Since the lead AV 802 a has traveled the portionof the road 102 between the lead AV 802 a and the following AV 802 b,the lead AV 802 a has experienced and recorded the environmental data150 b. The environmental data 150 b may comprise location coordinates ofa second plurality of objects between the lead AV 802 a and thefollowing AV 802 b. The environmental data 150 b may further compriseroad safety regulation data, data related to obstacles 118 (see FIG. 1),among any other data that the lead AV 802 a has experienced and recordedwhile traveling the portion of the road 102 between the lead AV 802 aand the following AV 802 b. The environmental data 150 a is associatedwith a time window during which the following AV 802 b is travelingalong the road 102.

At step 708, the control device 850 a determines whether at least oneobject detected in any of the sensor data 148 a and the environmentaldata 150 a and 150 b impedes performing the command 130 by the followingAV 802 b. For example, the control device 850 a may receive thetrajectory of the following AV 802 b (e.g., from the operation server120 and/or the following AV 802 b), and determine whether any objectdetected in any of the sensor data 148 a and environmental data 150 aand 150 b is on a traveling pathway of the following AV 802 b. If thecontrol device 850 a determines that at least one object detected in anyof the sensor data 148 a and environmental data 150 a and 150 b impedesperforming the command 130 by the following AV 802 b, method 700proceeds to step 712. Otherwise, method 700 proceeds to step 710.

At step 710, the control device 850 a communicates the command 130 tothe following AV 802 b. For example, the control device 850 acommunicates the original command 130 to the following AV 802 b via thecommunication subsystem 210.

At step 712, the control device 850 a updates the command 130 for thefollowing AV 802 b, such that the updated command 130-1 comprises one ormore instructions to avoid the at least one object while performing thecommand 130.

At step 714, the control device 850 a communicates the updated command130-1 to the following AV 802 b.

In one embodiment, the lead AV 802 a may further update and communicatecommands 130 (or updated commands 130-1, 130-2) to any particular AV 802that is in the V2V communication range 510 of the lead AV 802 aaccording to the sensor data 148 a, environmental data 150 a, and theaggregate of the environmental data 150 associated with a portion of theroad 102 between the lead AV 802 and the particular AV 802, similar tothat described in FIG. 5.

In cases where a particular AV 802 is not in the V2V communication range510 of the lead AV 802, the particular AV 802 may receive commands 130(or updated commands 130-1, 130-2) from another AV 802 (e.g., indirectlyfrom the lead AV 802 a) in the V2V communication range 510 of theparticular AV 802, similar to that described in FIG. 6. For example,multiple AVs 802 on the road 102 may form a network mesh of AVs 802 inwhich any AV 802 may send and receive commands 130 (or updated commands130-1, 130-2) or any other data/instruction to and from any other AV802.

Example AV and its Operation

FIG. 8 shows a block diagram of an example vehicle ecosystem 800 inwhich autonomous driving operations can be determined. As shown in FIG.8, the AV 802 may be a semi-trailer truck. The vehicle ecosystem 800includes several systems and components that can generate and/or deliverone or more sources of information/data and related services to thein-vehicle control computer 850 that may be located in an AV 802. Thein-vehicle control computer 850 can be in data communication with aplurality of vehicle subsystems 840, all of which can be resident in theAV 802. A vehicle subsystem interface 860 is provided to facilitate datacommunication between the in-vehicle control computer 850 and theplurality of vehicle subsystems 840. In some embodiments, the vehiclesubsystem interface 860 can include a controller area network (CAN)controller to communicate with devices in the vehicle subsystems 840.

The AV 802 may include various vehicle subsystems that support of theoperation of AV 802. The vehicle subsystems 840 may includecommunication subsystem 210, a vehicle drive subsystem 842, a vehiclesensor subsystem 844, and/or a vehicle control subsystem 848. Thecomponents or devices of the vehicle drive subsystem 842, the vehiclesensor subsystem 844, and the vehicle control subsystem 848 shown inFIG. 8 are examples. The AV 802 may be configured as shown or any otherconfigurations.

The vehicle drive subsystem 842 may include components operable toprovide powered motion for the AV 802. In an example embodiment, thevehicle drive subsystem 842 may include an engine/motor 842 a,wheels/tires 842 b, a transmission 842 c, an electrical subsystem 842 d,and a power source 842 e.

The vehicle sensor subsystem 844 may include a number of sensors 846configured to sense information about an environment or condition of theAV 802. The vehicle sensor subsystem 844 may include one or more cameras846 a or image capture devices, a Radar unit 846 b, one or moretemperature sensors 846 c, a wireless communication unit 846 d (e.g., acellular communication transceiver), an inertial measurement unit (IMU)846 e, a laser range finder/LiDAR unit 846 f, a Global PositioningSystem (GPS) transceiver 846 g, and/or a wiper control system 846 h. Thevehicle sensor subsystem 844 may also include sensors configured tomonitor internal systems of the AV 802 (e.g., an 02 monitor, a fuelgauge, an engine oil temperature, etc.).

The IMU 846 e may include any combination of sensors (e.g.,accelerometers and gyroscopes) configured to sense position andorientation changes of the AV 802 based on inertial acceleration. TheGPS transceiver 846 g may be any sensor configured to estimate ageographic location of the AV 802. For this purpose, the GPS transceiver846 g may include a receiver/transmitter operable to provide informationregarding the position of the AV 802 with respect to the Earth. TheRadar unit 846 b may represent a system that utilizes radio signals tosense objects within the local environment of the AV 802. In someembodiments, in addition to sensing the objects, the Radar unit 846 bmay additionally be configured to sense the speed and the heading of theobjects proximate to the AV 802. The laser range finder or LiDAR unit846 f may be any sensor configured to sense objects in the environmentin which the AV 802 is located using lasers. The cameras 846 a mayinclude one or more devices configured to capture a plurality of imagesof the environment of the AV 802. The cameras 846 a may be still imagecameras or motion video cameras.

The vehicle control subsystem 848 may be configured to control theoperation of the AV 802 and its components. Accordingly, the vehiclecontrol subsystem 848 may include various elements such as a throttleand gear selector 848 a, a brake unit 848 b, a navigation unit 848 c, asteering system 848 d, and/or an autonomous control unit 848 e. Thethrottle 848 a may be configured to control, for instance, the operatingspeed of the engine and, in turn, control the speed of the AV 802. Thegear selector 848 a may be configured to control the gear selection ofthe transmission. The brake unit 848 b can include any combination ofmechanisms configured to decelerate the AV 802. The brake unit 848 b canslow the AV in a standard manner, including by using friction to slowthe wheels or engine braking. The brake unit 848 b may include ananti-lock brake system (ABS) that can prevent the brakes from locking upwhen the brakes are applied. The navigation unit 848 c may be any systemconfigured to determine a driving path or route for the AV 802. Thenavigation 848 c unit may additionally be configured to update thedriving path dynamically while the AV 802 is in operation. In someembodiments, the navigation unit 848 c may be configured to incorporatedata from the GPS transceiver 846 g and one or more predetermined mapsso as to determine the driving path (e.g., along the road 102 of FIG. 1)for the AV 802. The steering system 848 d may represent any combinationof mechanisms that may be operable to adjust the heading of AV 802 in anautonomous mode or in a driver-controlled mode.

The autonomous control unit 848 e may represent a control systemconfigured to identify, evaluate, and avoid or otherwise negotiatepotential obstacles or obstructions in the environment of the AV 802. Ingeneral, the autonomous control unit 848 e may be configured to controlthe AV 802 for operation without a driver or to provide driverassistance in controlling the AV 802. In some embodiments, theautonomous control unit 848 e may be configured to incorporate data fromthe GPS transceiver 846 g, the Radar 846 b, the LiDAR unit 846 f, thecameras 846 a, and/or other vehicle subsystems to determine the drivingpath or trajectory for the AV 802.

Many or all of the functions of the AV 802 can be controlled by thein-vehicle control computer 850. The in-vehicle control computer 850 mayinclude at least one data processor 870 (which can include at least onemicroprocessor) that executes processing instructions 880 stored in anon-transitory computer readable medium, such as the data storage device890 or memory. The in-vehicle control computer 850 may also represent aplurality of computing devices that may serve to control individualcomponents or subsystems of the AV 802 in a distributed fashion. In someembodiments, the data storage device 890 may contain processinginstructions 880 (e.g., program logic) executable by the data processor870 to perform various methods and/or functions of the AV 802, includingthose described with respect to FIGS. 1-7.

The data storage device 890 may contain additional instructions as well,including instructions to transmit data to, receive data from, interactwith, or control one or more of the vehicle drive subsystem 842, thevehicle sensor subsystem 844, and the vehicle control subsystem 848. Thein-vehicle control computer 850 can be configured to include a dataprocessor 870 and a data storage device 890. The in-vehicle controlcomputer 850 may control the function of the AV 802 based on inputsreceived from various vehicle subsystems (e.g., the vehicle drivesubsystem 842, the vehicle sensor subsystem 844, and the vehicle controlsubsystem 848).

FIG. 9 shows an exemplary system 900 for providing precise autonomousdriving operations. The system 900 includes several modules that canoperate in the in-vehicle control computer 850, as described in FIG. 8.The in-vehicle control computer 850 includes a sensor fusion module 902shown in the top left corner of FIG. 9, where the sensor fusion module902 may perform at least four image or signal processing operations. Thesensor fusion module 902 can obtain images from cameras located on anautonomous vehicle to perform image segmentation 904 to detect thepresence of moving objects (e.g., other vehicles, pedestrians, etc.,)and/or static obstacles (e.g., stop sign, speed bump, terrain, etc.,)located around the autonomous vehicle. The sensor fusion module 902 canobtain LiDAR point cloud data item from LiDAR sensors located on theautonomous vehicle to perform LiDAR segmentation 906 to detect thepresence of objects and/or obstacles located around the autonomousvehicle.

The sensor fusion module 902 can perform instance segmentation 908 onimage and/or point cloud data item to identify an outline (e.g., boxes)around the objects and/or obstacles located around the autonomousvehicle. The sensor fusion module 902 can perform temporal fusion 910where objects and/or obstacles from one image and/or one frame of pointcloud data item are correlated with or associated with objects and/orobstacles from one or more images or frames subsequently received intime.

The sensor fusion module 902 can fuse the objects and/or obstacles fromthe images obtained from the camera and/or point cloud data itemobtained from the LiDAR sensors. For example, the sensor fusion module902 may determine based on a location of two cameras that an image fromone of the cameras comprising one half of a vehicle located in front ofthe autonomous vehicle is the same as the vehicle located captured byanother camera. The sensor fusion module 902 sends the fused objectinformation to the interference module 946 and the fused obstacleinformation to the occupancy grid module 960. The in-vehicle controlcomputer includes the occupancy grid module 960 which can retrievelandmarks from a map database 958 stored in the in-vehicle controlcomputer. The occupancy grid module 960 can determine drivable areasand/or obstacles from the fused obstacles obtained from the sensorfusion module 902 and the landmarks stored in the map database 958. Forexample, the occupancy grid module 960 can determine that a drivablearea may include a speed bump obstacle.

Below the sensor fusion module 902, the in-vehicle control computer 850includes a LiDAR based object detection module 912 that can performobject detection 916 based on point cloud data item obtained from theLiDAR sensors 914 located on the autonomous vehicle. The objectdetection 916 technique can provide a location (e.g., in 3D worldcoordinates) of objects from the point cloud data item. Below the LiDARbased object detection module 912, the in-vehicle control computerincludes an image-based object detection module 918 that can performobject detection 924 based on images obtained from cameras 920 locatedon the autonomous vehicle. The object detection 918 technique can employa deep machine learning technique 924 to provide a location (e.g., in 3Dworld coordinates) of objects from the image provided by the camera 920.

The Radar 956 on the autonomous vehicle can scan an area in front of theautonomous vehicle or an area towards which the autonomous vehicle isdriven. The Radar data is sent to the sensor fusion module 902 that canuse the Radar data to correlate the objects and/or obstacles detected bythe Radar 956 with the objects and/or obstacles detected from both theLiDAR point cloud data item and the camera image. The Radar data is alsosent to the interference module 946 that can perform data processing onthe Radar data to track objects by object tracking module 948 as furtherdescribed below.

The in-vehicle control computer includes an interference module 946 thatreceives the locations of the objects from the point cloud and theobjects from the image, and the fused objects from the sensor fusionmodule 902. The interference module 946 also receives the Radar datawith which the interference module 946 can track objects by objecttracking module 948 from one point cloud data item and one imageobtained at one time instance to another (or the next) point cloud dataitem and another image obtained at another subsequent time instance.

The interference module 946 may perform object attribute estimation 950to estimate one or more attributes of an object detected in an image orpoint cloud data item. The one or more attributes of the object mayinclude a type of object (e.g., pedestrian, car, or truck, etc.). Theinterference module 946 may perform behavior prediction 952 to estimateor predict motion pattern of an object detected in an image and/or apoint cloud. The behavior prediction 952 can be performed to detect alocation of an object in a set of images received at different points intime (e.g., sequential images) or in a set of point cloud data itemreceived at different points in time (e.g., sequential point cloud dataitems). In some embodiments the behavior prediction 952 can be performedfor each image received from a camera and/or each point cloud data itemreceived from the LiDAR sensor. In some embodiments, the interferencemodule 946 can be performed (e.g., run or executed) to reducecomputational load by performing behavior prediction 952 on every otheror after every pre-determined number of images received from a camera orpoint cloud data item received from the LiDAR sensor (e.g., after everytwo images or after every three point cloud data items).

The behavior prediction 952 feature may determine the speed anddirection of the objects that surround the autonomous vehicle from theRadar data, where the speed and direction information can be used topredict or determine motion patterns of objects. A motion pattern maycomprise a predicted trajectory information of an object over apre-determined length of time in the future after an image is receivedfrom a camera. Based on the motion pattern predicted, the interferencemodule 946 may assign motion pattern situational tags to the objects(e.g., “located at coordinates (x,y),” “stopped,” “driving at 50 mph,”“speeding up” or “slowing down”). The situation tags can describe themotion pattern of the object. The interference module 946 sends the oneor more object attributes (e.g., types of the objects) and motionpattern situational tags to the planning module 962. The interferencemodule 946 may perform an environment analysis 954 using any informationacquired by system 900 and any number and combination of its components.

The in-vehicle control computer includes the planning module 962 thatreceives the object attributes and motion pattern situational tags fromthe interference module 946, the drivable area and/or obstacles, and thevehicle location and pose information from the fused localization module926 (further described below).

The planning module 962 can perform navigation planning 964 to determinea set of trajectories on which the autonomous vehicle can be driven. Theset of trajectories can be determined based on the drivable areainformation, the one or more object attributes of objects, the motionpattern situational tags of the objects, location of the obstacles, andthe drivable area information. In some embodiments, the navigationplanning 964 may include determining an area next to the road where theautonomous vehicle can be safely parked in case of emergencies. Theplanning module 962 may include behavioral decision making 966 todetermine driving actions (e.g., steering, braking, throttle) inresponse to determining changing conditions on the road (e.g., trafficlight turned yellow, or the autonomous vehicle is in an unsafe drivingcondition because another vehicle drove in front of the autonomousvehicle and in a region within a pre-determined safe distance of thelocation of the autonomous vehicle). The planning module 962 performstrajectory generation 968 and selects a trajectory from the set oftrajectories determined by the navigation planning operation 964. Theselected trajectory information is sent by the planning module 962 tothe control module 970.

The in-vehicle control computer includes a control module 970 thatreceives the proposed trajectory from the planning module 962 and theautonomous vehicle location and pose from the fused localization module926. The control module 970 includes a system identifier 972. Thecontrol module 970 can perform a model based trajectory refinement 974to refine the proposed trajectory. For example, the control module 970can applying a filtering (e.g., Kalman filter) to make the proposedtrajectory data smooth and/or to minimize noise. The control module 970may perform the robust control 976 by determining, based on the refinedproposed trajectory information and current location and/or pose of theautonomous vehicle, an amount of brake pressure to apply, a steeringangle, a throttle amount to control the speed of the vehicle, and/or atransmission gear. The control module 970 can send the determined brakepressure, steering angle, throttle amount, and/or transmission gear toone or more devices in the autonomous vehicle to control and facilitateprecise driving operations of the autonomous vehicle.

The deep image-based object detection 924 performed by the image-basedobject detection module 918 can also be used detect landmarks (e.g.,stop signs, speed bumps, etc.,) on the road (e.g., road 102 of FIG. 1).The in-vehicle control computer includes a fused localization module 926that obtains landmarks detected from images, the landmarks obtained froma map database 936 stored on the in-vehicle control computer, thelandmarks detected from the point cloud data item by the LiDAR basedobject detection module 912, the speed and displacement from theodometer sensor 944 and the estimated location of the autonomous vehiclefrom the GPS/IMU sensor 938 (i.e., GPS sensor 940 and IMU sensor 942)located on or in the autonomous vehicle. Based on this information, thefused localization module 926 can perform a localization operation 928to determine a location of the autonomous vehicle, which can be sent tothe planning module 962 and the control module 970.

The fused localization module 926 can estimate pose 930 of theautonomous vehicle based on the GPS and/or IMU sensors 938. The pose ofthe autonomous vehicle can be sent to the planning module 962 and thecontrol module 970. The fused localization module 926 can also estimatestatus (e.g., location, possible angle of movement) of the trailer unitbased on (e.g., trailer status estimation 934), for example, theinformation provided by the IMU sensor 942 (e.g., angular rate and/orlinear velocity). The fused localization module 926 may also check themap content 932.

FIG. 10 shows an exemplary block diagram of an in-vehicle controlcomputer 850 included in an autonomous AV 802. The in-vehicle controlcomputer 850 includes at least one processor 1004 and a memory 1002having instructions stored thereupon (e.g., software instructions 138,244, and processing instructions 880 in FIGS. 1, 2, and 8,respectively). The instructions, upon execution by the processor 1004,configure the in-vehicle control computer 850 and/or the various modulesof the in-vehicle control computer 850 to perform the operationsdescribed in FIGS. 1-7. The transmitter 1006 transmits or sendsinformation or data to one or more devices in the autonomous vehicle.For example, the transmitter 1006 can send an instruction to one or moremotors of the steering wheel to steer the autonomous vehicle. Thereceiver 1008 receives information or data transmitted or sent by one ormore devices. For example, the receiver 1008 receives a status of thecurrent speed from the odometer sensor or the current transmission gearfrom the transmission. The transmitter 1006 and receiver 1008 are alsoconfigured to communicate with plurality of vehicle subsystems 840 andthe in-vehicle control computer 850 described above in FIGS. 8 and 9.

While several embodiments have been provided in this disclosure, itshould be understood that the disclosed systems and methods might beembodied in many other specific forms without departing from the spiritor scope of this disclosure. The present examples are to be consideredas illustrative and not restrictive, and the intention is not to belimited to the details given herein. For example, the various elementsor components may be combined or integrated into another system orcertain features may be omitted, or not implemented.

In addition, techniques, systems, subsystems, and methods described andillustrated in the various embodiments as discrete or separate may becombined or integrated with other systems, modules, techniques, ormethods without departing from the scope of this disclosure. Other itemsshown or discussed as coupled or directly coupled or communicating witheach other may be indirectly coupled or communicating through someinterface, device, or intermediate component whether electrically,mechanically, or otherwise. Other examples of changes, substitutions,and alterations are ascertainable by one skilled in the art and could bemade without departing from the spirit and scope disclosed herein.

To aid the Patent Office, and any readers of any patent issued on thisapplication in interpreting the claims appended hereto, applicants notethat they do not intend any of the appended claims to invoke 35 U.S.C. §112(f) as it exists on the date of filing hereof unless the words “meansfor” or “step for” are explicitly used in the particular claim.

Implementations of the disclosure can be described in view of thefollowing clauses, the features of which can be combined in anyreasonable manner.

Clause 1. A system, comprising:

a lead autonomous vehicle (AV) comprising at least one vehicle sensor,wherein the lead AV is configured to travel along a road;

a following AV, different from the lead AV and communicatively coupledwith the lead AV, wherein the following AV is traveling along the roadbehind the lead AV;

a first control device associated with the lead AV and comprising afirst processor configured to:

-   -   receive a command to navigate the lead AV to avoid an unexpected        road condition ahead of the lead AV;    -   receive, from the at least one vehicle sensor, sensor data        comprising location coordinates of a first plurality of objects        ahead of the lead AV;    -   access a first set of environmental data associated with a        portion of the road between the lead AV and the following AV,        wherein the first set of environmental data comprises location        coordinates of a second plurality of objects between the lead AV        and the following AV;    -   determine whether at least one object from the first and second        plurality of objects impedes performing the command by the        following AV;    -   in response to determining that the at least one object impedes        performing the command by the following AV, update the command        for the following AV, based at least in part upon the sensor        data and the first set of environmental data, such that the        updated command comprises one or more navigation instructions to        avoid the at least one object while performing the command; and    -   communicate the updated command to the following AV.

Clause 2. The system of Clause 1, wherein the unexpected road conditioncomprises at least one of an unexpected weather condition and anunexpected traffic congestion.

Clause 3. The system of Clause 1, wherein the first set of environmentaldata is associated with a time window during which the following AV istraveling along the road.

Clause 4. The system of Clause 1, further comprising a second controldevice associated with the following AV and comprising a secondprocessor configured to:

receive, from the lead AV, the updated command; and

navigate the following AV according to the updated command.

Clause 5. The system of Clause 4, wherein the following AV comprises afirst following AV and the system further comprising a second followingAV, communicatively coupled with the first following AV, the secondfollowing AV is traveling along the road behind the first following AV,wherein:

the second processor is further configured to:

-   -   access a second set of environmental data associated with a        portion of the road between the first following AV and the        second following AV, wherein the second set of environmental        data comprises location coordinates of a third plurality of        objects between the first following AV and the second following        AV;    -   determine whether at least one object from the third plurality        of objects impedes performing the updated command;    -   in response to determining that the at least one object impedes        performing the updated command, generate a second updated        command by updating the updated command based at least in part        upon the aggregate of the first and second sets of environmental        data, such that the second updated command comprises one or more        navigation instructions to avoid the at least one object from        the third plurality of objects while performing the updated        command; and    -   communicate the second updated command to the second following        AV.

Clause 6. The system of Clause 1, wherein:

the lead AV and the following AV are within a Vehicle-to-Vehicle (V2V)communication range, and

the V2V communication range corresponds to a threshold distance of a V2Vmodule implemented in the lead AV and the following AV to establish acommunication path between the lead AV and the following AV.

Clause 7. The system of Clause 5, wherein the first processor is furtherconfigured to:

in response to the lead AV and the second following AV being within aVehicle-to-Vehicle (V2V) communication range, generate the secondupdated command for the second following AV, based at least in part uponthe aggregate of the first and second sets of environmental data; and

communicate the second updated command to the second following AV.

Clause 8. A method comprising:

receiving a command to navigate a lead autonomous vehicle (AV) to avoidan unexpected road condition ahead of the lead AV, wherein:

-   -   the lead AV comprises at least one vehicle sensor; and    -   the lead AV is configured to travel along a road;

receiving, from the at least one vehicle sensor, sensor data comprisinglocation coordinates of a first plurality of objects ahead of the leadAV;

accessing a first set of environmental data associated with a portion ofthe road between the lead AV and a following AV, wherein:

-   -   the following AV is communicatively coupled with the lead AV,        and is traveling along the road behind the lead AV; and    -   the first set of environmental data comprises location        coordinates of a second plurality of objects between the lead AV        and the following AV;

determining whether at least one object from the first and secondplurality of objects impedes performing the command by the following AV;

in response to determining that the at least one object impedesperforming the command by the following AV, updating the command for thefollowing AV, based at least in part upon the sensor data and the firstset of environmental data, such that the updated command comprises oneor more navigation instructions to avoid the at least one object whileperforming the command; and

communicating the updated command to the following AV.

Clause 9. The method of Clause 8, further comprising:

generating a second updated command by updating the command fornavigating the lead AV, based at least in part upon the sensor data,such that the second updated command comprises one or more navigationinstructions to avoid the first plurality of objects while performingthe command; and

navigating the lead AV according to the second updated command.

Clause 10. The method of Clause 8, further comprising:

accessing environmental data associated with a portion of the road aheadof the lead AV, wherein the environmental data is associated with a timewindow during which the lead AV is traveling along the road;

comparing the environmental data with map data that comprises expectedroad conditions ahead of the lead AV;

based at least in part upon comparing the environmental data with themap data, determining whether the environmental data comprises anunexpected road condition that is not included in the map data; and

in response to determining that the environmental data comprises theunexpected road condition that is not included in the map data:

-   -   determining a location coordinate of the unexpected road        condition; and    -   communicating the command to the lead AV to maneuver to avoid        the unexpected road condition.

Clause 11. The method of Clause 8, further comprising:

comparing the sensor data with map data, wherein the map data compriseslocation coordinates of expected objects on the road ahead of the leadAV;

based at least in part upon comparing the sensor data with the map data,determining whether the sensor data indicates an unexpected object thatis not in the map data;

in response to determining that the sensor data indicates the unexpectedobject that is not in the map data:

-   -   determining a location coordinate of the unexpected object; and    -   determining a proposed navigation instruction for the lead AV to        avoid the unexpected object.

Clause 12. The method of Clause 11, further comprising, in response todetermining that the sensor data indicates the unexpected object that isnot in the map data, performing the proposed navigation instruction.

Clause 13. The method of Clause 11, further comprising, in response todetermining that the sensor data indicates the unexpected object that isnot in the map data:

communicating the proposed navigation instruction to an operationserver;

determining whether a confirmation is received from the operation serverto perform the proposed navigation instruction; and

in response to receiving the confirmation from the operation server,performing the proposed navigation instruction.

Clause 14. The method of Clause 11, further comprising, in response todetermining that the sensor data indicates the unexpected object that isnot in the map data:

communicating the sensor data to an operation server; and

requesting the operation server to provide instructions to avoid theunexpected object based at least in part upon the sensor data.

Clause 15. The method of Clause 8, wherein the command is related to atleast one of:

a transition, by the lead AV, from autonomous driving to manual driving;

avoiding, by the lead AV, obstacles on the road ahead of the lead AV;

avoiding, by the lead AV, one or more certain lanes on which one or moreobstacles are detected;

avoiding, by the lead AV, one or more certain routes on which theunexpected road condition is detected;

taking, by the lead AV, a particular re-route; and

driving, by the lead AV, slower or faster than the speed indicated in adriving instruction associated with the lead AV.

Clause 16. A computer program comprising executable instructions storedin a non-transitory computer-readable medium that when executed by oneor more processors causes the one or more processors to:

receive a command to navigate a lead autonomous vehicle (AV) to avoid anunexpected road condition ahead of the lead AV, wherein:

-   -   the lead AV comprises at least one vehicle sensor; and    -   the lead AV is configured to travel along a road;

receive, from the at least one vehicle sensor, sensor data comprisinglocation coordinates of a first plurality of objects ahead of the leadAV;

access a first set of environmental data associated with a portion ofthe road between the lead AV and a following AV, wherein:

-   -   the following AV is communicatively coupled with the lead AV,        and is traveling along the road behind the lead AV; and    -   the first set of environmental data comprises location        coordinates of a second plurality of objects between the lead AV        and the following AV;

determine whether at least one object from the first and secondplurality of objects impedes performing the command by the following AV;

in response to determining that the at least one object impedesperforming the command by the following AV, update the command for thefollowing AV, based at least in part upon the sensor data and the firstset of environmental data, such that the updated command comprises oneor more navigation instructions to avoid the at least one object whileperforming the command; and

communicate the updated command to the following AV.

Clause 17. The computer program of Clause 16, wherein:

the command comprises a broad command directed to the lead AV and one ormore following AVs that are behind the lead AV on the road; and

the broad command comprises one or more navigation instructions to avoida particular unexpected road condition ahead of the lead AV.

Clause 18. The computer program of Clause 16, wherein:

the command comprises a specific command directed to the lead AV; and

the specific command comprises one or more navigation instructions toavoid a particular unexpected road condition ahead of the lead AV.

Clause 19. The computer program of Clause 16, wherein:

the command comprises a configuration command; and

the configuration command comprises at least one of changing a directionof the at least one vehicle sensor and changing a data samplingfrequency of the at least one vehicle sensor.

Clause 20. The computer program of Clause 16, wherein the at least onevehicle sensor comprises at least one of a camera, Light Detection andRanging (LiDAR) sensor, motion sensor, and infrared sensor.

1. A system, comprising: a lead autonomous vehicle comprising at leastone vehicle sensor, wherein the lead autonomous vehicle is configured totravel along a road; a following autonomous vehicle, different from thelead autonomous vehicle and communicatively coupled with the leadautonomous vehicle, wherein the following autonomous vehicle istraveling along the road behind the lead autonomous vehicle; a firstcontrol device associated with the lead autonomous vehicle andcomprising a first processor configured to: receive a command tonavigate the lead autonomous vehicle to avoid an unexpected roadcondition ahead of the lead autonomous vehicle; receive, from the atleast one vehicle sensor, sensor data comprising location coordinates ofa first plurality of objects ahead of the lead autonomous vehicle;access a first set of environmental data associated with a portion ofthe road between the lead autonomous vehicle and the followingautonomous vehicle, wherein the first set of environmental datacomprises location coordinates of a second plurality of objects betweenthe lead autonomous vehicle and the following autonomous vehicle;determine whether at least one object from the first and secondplurality of objects impedes performing the command by the followingautonomous vehicle; in response to determining that the at least oneobject impedes performing the command by the following autonomousvehicle, update the command for the following autonomous vehicle, basedat least in part upon the sensor data and the first set of environmentaldata, such that the updated command comprises one or more navigationinstructions to avoid the at least one object while performing thecommand; and communicate the updated command to the following autonomousvehicle.
 2. The system of claim 1, wherein the unexpected road conditioncomprises at least one of an unexpected weather condition and anunexpected traffic congestion.
 3. The system of claim 1, wherein thefirst set of environmental data is associated with a time window duringwhich the following autonomous vehicle is traveling along the road. 4.The system of claim 1, further comprising a second control deviceassociated with the following autonomous vehicle and comprising a secondprocessor configured to: receive, from the lead autonomous vehicle, theupdated command; and navigate the following autonomous vehicle accordingto the updated command.
 5. The system of claim 4, wherein the followingautonomous vehicle comprises a first following autonomous vehicle andthe system further comprising a second following autonomous vehicle,communicatively coupled with the first following autonomous vehicle, thesecond following autonomous vehicle is traveling along the road behindthe first following autonomous vehicle, wherein: the second processor isfurther configured to: access a second set of environmental dataassociated with a portion of the road between the first followingautonomous vehicle and the second following autonomous vehicle, whereinthe second set of environmental data comprises location coordinates of athird plurality of objects between the first following autonomousvehicle and the second following autonomous vehicle; determine whetherat least one object from the third plurality of objects impedesperforming the updated command; in response to determining that the atleast one object impedes performing the updated command, generate asecond updated command by updating the updated command based at least inpart upon the aggregate of the first and second sets of environmentaldata, such that the second updated command comprises one or morenavigation instructions to avoid the at least one object from the thirdplurality of objects while performing the updated command; andcommunicate the second updated command to the second followingautonomous vehicle.
 6. The system of claim 1, wherein: the leadautonomous vehicle and the following autonomous vehicle are within aVehicle-to-Vehicle communication range, and the Vehicle-to-Vehiclecommunication range corresponds to a threshold distance of aVehicle-to-Vehicle module implemented in the lead autonomous vehicle andthe following autonomous vehicle to establish a communication pathbetween the lead autonomous vehicle and the following autonomousvehicle.
 7. The system of claim 5, wherein the first processor isfurther configured to: in response to the lead autonomous vehicle andthe second following autonomous vehicle being within aVehicle-to-Vehicle communication range, generate the second updatedcommand for the second following autonomous vehicle, based at least inpart upon the aggregate of the first and second sets of environmentaldata; and communicate the second updated command to the second followingautonomous vehicle.
 8. A method comprising: receiving a command tonavigate a lead autonomous vehicle to avoid an unexpected road conditionahead of the lead autonomous vehicle, wherein: the lead autonomousvehicle comprises at least one vehicle sensor; and the lead autonomousvehicle is configured to travel along a road; receiving, from the atleast one vehicle sensor, sensor data comprising location coordinates ofa first plurality of objects ahead of the lead autonomous vehicle;accessing a first set of environmental data associated with a portion ofthe road between the lead autonomous vehicle and a following autonomousvehicle, wherein: the following autonomous vehicle is communicativelycoupled with the lead autonomous vehicle, and is traveling along theroad behind the lead autonomous vehicle; and the first set ofenvironmental data comprises location coordinates of a second pluralityof objects between the lead autonomous vehicle and the followingautonomous vehicle; determining whether at least one object from thefirst and second plurality of objects impedes performing the command bythe following autonomous vehicle, in response to determining that the atleast one object impedes performing the command by the followingautonomous vehicle, updating the command for the following autonomousvehicle, based at least in part upon the sensor data and the first setof environmental data, such that the updated command comprises one ormore navigation instructions to avoid the at least one object whileperforming the command; and communicating the updated command to thefollowing autonomous vehicle.
 9. The method of claim 8, furthercomprising: generating a second updated command by updating the commandfor navigating the lead autonomous vehicle, based at least in part uponthe sensor data, such that the second updated command comprises one ormore navigation instructions to avoid the first plurality of objectswhile performing the command; and navigating the lead autonomous vehicleaccording to the second updated command.
 10. The method of claim 8,further comprising: accessing environmental data associated with aportion of the road ahead of the lead autonomous vehicle, wherein theenvironmental data is associated with a time window during which thelead autonomous vehicle is traveling along the road; comparing theenvironmental data with map data that comprises expected road conditionsahead of the lead autonomous vehicle; based at least in part uponcomparing the environmental data with the map data, determining whetherthe environmental data comprises an unexpected road condition that isnot included in the map data; and in response to determining that theenvironmental data comprises the unexpected road condition that is notincluded in the map data: determining a location coordinate of theunexpected road condition; and communicating the command to the leadautonomous vehicle to maneuver to avoid the unexpected road condition.11. The method of claim 8, further comprising: comparing the sensor datawith map data, wherein the map data comprises location coordinates ofexpected objects on the road ahead of the lead autonomous vehicle, basedat least in part upon comparing the sensor data with the map data,determining whether the sensor data indicates an unexpected object thatis not in the map data; in response to determining that the sensor dataindicates the unexpected object that is not in the map data: determininga location coordinate of the unexpected object; and determining aproposed navigation instruction for the lead autonomous vehicle to avoidthe unexpected object.
 12. The method of claim 11, further comprising,in response to determining that the sensor data indicates the unexpectedobject that is not in the map data, performing the proposed navigationinstruction.
 13. The method of claim 11, further comprising, in responseto determining that the sensor data indicates the unexpected object thatis not in the map data: communicating the proposed navigationinstruction to an operation server; determining whether a confirmationis received from the operation server to perform the proposed navigationinstruction; and in response to receiving the confirmation from theoperation server, performing the proposed navigation instruction. 14.The method of claim 11, further comprising, in response to determiningthat the sensor data indicates the unexpected object that is not in themap data: communicating the sensor data to an operation server; andrequesting the operation server to provide instructions to avoid theunexpected object based at least in part upon the sensor data.
 15. Themethod of claim 8, wherein the command is related to at least one of: atransition, by the lead autonomous vehicle, from autonomous driving tomanual driving; avoiding, by the lead autonomous vehicle, obstacles onthe road ahead of the lead autonomous vehicle; avoiding, by the leadautonomous vehicle, one or more certain lanes on which one or moreobstacles are detected; avoiding, by the lead autonomous vehicle, one ormore certain routes on which the unexpected road condition is detected;taking, by the lead autonomous vehicle, a particular re-route; anddriving, by the lead autonomous vehicle, slower or faster than the speedindicated in a driving instruction associated with the lead autonomousvehicle.
 16. A computer program comprising executable instructionsstored in a non-transitory computer-readable medium that when executedby one or more processors causes the one or more processors to: receivea command to navigate a lead autonomous vehicle to avoid an unexpectedroad condition ahead of the lead autonomous vehicle, wherein: the leadautonomous vehicle comprises at least one vehicle sensor; and the leadautonomous vehicle is configured to travel along a road; receive, fromthe at least one vehicle sensor, sensor data comprising locationcoordinates of a first plurality of objects ahead of the lead autonomousvehicle; access a first set of environmental data associated with aportion of the road between the lead autonomous vehicle and a followingautonomous vehicle, wherein: the following autonomous vehicle iscommunicatively coupled with the lead autonomous vehicle, and istraveling along the road behind the lead autonomous vehicle; and thefirst set of environmental data comprises location coordinates of asecond plurality of objects between the lead autonomous vehicle and thefollowing autonomous vehicle; determine whether at least one object fromthe first and second plurality of objects impedes performing the commandby the following autonomous vehicle, in response to determining that theat least one object impedes performing the command by the followingautonomous vehicle, update the command for the following autonomousvehicle, based at least in part upon the sensor data and the first setof environmental data, such that the updated command comprises one ormore navigation instructions to avoid the at least one object whileperforming the command; and communicate the updated command to thefollowing autonomous vehicle.
 17. The computer program of claim 16,wherein: the command comprises a broad command directed to the leadautonomous vehicle and one or more following autonomous vehicles thatare behind the lead autonomous vehicle on the road; and the broadcommand comprises one or more navigation instructions to avoid aparticular unexpected road condition ahead of the lead autonomousvehicle.
 18. The computer program of claim 16, wherein: the commandcomprises a specific command directed to the lead autonomous vehicle;and the specific command comprises one or more navigation instructionsto avoid a particular unexpected road condition ahead of the leadautonomous vehicle.
 19. The computer program of claim 16, wherein: thecommand comprises a configuration command; and the configuration commandcomprises at least one of changing a direction of the at least onevehicle sensor and changing a data sampling frequency of the at leastone vehicle sensor.
 20. The computer program of claim 16, wherein the atleast one vehicle sensor comprises at least one of a camera, LightDetection and Ranging (LiDAR) sensor, motion sensor, and infraredsensor.